81135680

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8179}}^1$

素因数の和:8227

約数の個数: 56

約数和(自身を含む): 199461120

約数和(自身を除く): 118325440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2480, 4960, 8179, 9920, 16358, 32716, 40895, 65432, 81790, 130864, 163580, 253549, 261728, 327160, 507098, 523456, 654320, 1014196, 1267745, 1308640, 2028392, 2535490, 2617280, 4056784, 5070980, 8113568, 10141960, 16227136, 20283920, 40567840, 81135680]

約数ペア:

[(1, 81135680), (2, 40567840), (4, 20283920), (5, 16227136), (8, 10141960), (10, 8113568), (16, 5070980), (20, 4056784), (31, 2617280), (32, 2535490), (40, 2028392), (62, 1308640), (64, 1267745), (80, 1014196), (124, 654320), (155, 523456), (160, 507098), (248, 327160), (310, 261728), (320, 253549), (496, 163580), (620, 130864), (992, 81790), (1240, 65432), (1984, 40895), (2480, 32716), (4960, 16358), (8179, 9920)]