81220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:171

約数の個数: 24

約数和(自身を含む): 177408

約数和(自身を除く): 96188

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 131, 155, 262, 310, 524, 620, 655, 1310, 2620, 4061, 8122, 16244, 20305, 40610, 81220]

約数ペア:

[(1, 81220), (2, 40610), (4, 20305), (5, 16244), (10, 8122), (20, 4061), (31, 2620), (62, 1310), (124, 655), (131, 620), (155, 524), (262, 310)]