Search a number
abundant n.  and  pentagonal n.

First numbers that belong to both sets:

12, 70, 176, 210, 330, 532, 852, 1080, 1520, 1820, 1926, 2262, 2380, 2752, 3290, 3432, 3876, 4030, 4510, 4676, 5192, 5370, 5922, 6700, 7740, 8400, 9560, 10542, 11310, 12376, 12650, 13776, 14652, 14950, 17120, 17442, 18426, 18760, 19780, 20475, 21540, 22632, 25676, 26070, 27270, 27676, 28912, 29330, 31032, 32340, 34580, 35960, 36426, 37842, 38320, 42252, 43776, 45850, 46376, 48510, 50142, 52360, 55200, 56940, 59900, 61712, 62322, 64170, 64792, 69230, 69876, 71832, 75152, 77180, 77862, 79926, 80620, 82720, 86280, 88452, 91390, 95130, 97410, 98176, 100492, 101270, 104412, 106800, 110840, 113300, 114126, 116622, 117460, 123410, 124272, 126876, 127750, 130390, 133952, 134850, 137562, 141220, 142142, 145860, 148680, 153440, 156332, 157302, 160230, 164176, 169176, 172212, 180440, 181482, 184626, 185680, 188860, 194220, 197472, 201850, 206276, 207390, 210750, 211876, 216410, 220992, 224460, 230300, 233840, 235026, 238602, 239800, 248270, 249492, 253176, 254410, 259376, 264390, 268182, 273280, 279720, 283620, 290180, 295482, 299490, 300832, 304876, 310310, 311676, 315792, 317170, 319935, 322712, 326900, 328302, 332526, 333940, 338200, 341055, 345360, 349692, 356972, 361376, 362850, 367290, 373252, 380772, 385320, 392960, 397580, 399126, 403782, 405340, 410032, 417912, 422676, 424270, 435512, 437130, 442002, 443632, 448540, 456780, 461760, 470120, 476862, 481950, 490490, 497376, 502572, 516560, 518322, 523626, 525400, 530740, 539700, 545112, 552370, 554192, 561510, 567030, 568876, 574432, 576290, 583752, 589380, 598820, 604520, 606426, 612162, 614080, 617925, 629532, 635376, 637330, 645176, 653070, 659022, 667000, 677040, 683100, 693260, 699392, 701442, 707610, 715876, 726276, 732552, 734650, 743072, 749420, 751542, 757926, 760060, 766480, 777240, 783732, 794612, 801176, 803370, 809970, 812176, 821030, 829932, 836640, 847880, 854660, 856926, 863742, 866020, 872872, 882050, 884352, 891276, 900550, 909872, 912210, 919242, 921592, 928660, 940500, 947640, 959600, 966812, 969222, 976470, 983745, 986176, 988610, 998376, 1005732, 1018052, 1025480, 1027962, 1035426, 1037920, 1045420, 1057980, 1065552, 1075690.

Some larger examples :