81028420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^2$

素因数の和:269

約数の個数: 72

約数和(自身を含む): 193390848

約数和(自身を除く): 112362428

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 109, 110, 124, 155, 218, 220, 310, 341, 436, 545, 620, 682, 1090, 1199, 1364, 1705, 2180, 2398, 3379, 3410, 4796, 5995, 6758, 6820, 11881, 11990, 13516, 16895, 23762, 23980, 33790, 37169, 47524, 59405, 67580, 74338, 118810, 130691, 148676, 185845, 237620, 261382, 368311, 371690, 522764, 653455, 736622, 743380, 1306910, 1473244, 1841555, 2613820, 3683110, 4051421, 7366220, 8102842, 16205684, 20257105, 40514210, 81028420]

約数ペア:

[(1, 81028420), (2, 40514210), (4, 20257105), (5, 16205684), (10, 8102842), (11, 7366220), (20, 4051421), (22, 3683110), (31, 2613820), (44, 1841555), (55, 1473244), (62, 1306910), (109, 743380), (110, 736622), (124, 653455), (155, 522764), (218, 371690), (220, 368311), (310, 261382), (341, 237620), (436, 185845), (545, 148676), (620, 130691), (682, 118810), (1090, 74338), (1199, 67580), (1364, 59405), (1705, 47524), (2180, 37169), (2398, 33790), (3379, 23980), (3410, 23762), (4796, 16895), (5995, 13516), (6758, 11990), (6820, 11881)]