81212890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{4079}}^1$

素因数の和:4278

約数の個数: 32

約数和(自身を含む): 160392960

約数和(自身を除く): 79180070

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 181, 362, 905, 1810, 1991, 3982, 4079, 8158, 9955, 19910, 20395, 40790, 44869, 89738, 224345, 448690, 738299, 1476598, 3691495, 7382990, 8121289, 16242578, 40606445, 81212890]

約数ペア:

[(1, 81212890), (2, 40606445), (5, 16242578), (10, 8121289), (11, 7382990), (22, 3691495), (55, 1476598), (110, 738299), (181, 448690), (362, 224345), (905, 89738), (1810, 44869), (1991, 40790), (3982, 20395), (4079, 19910), (8158, 9955)]