20336440

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3881}}^1$

素因数の和:4023

約数の個数: 32

約数和(自身を含む): 46118160

約数和(自身を除く): 25781720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3881, 5240, 7762, 15524, 19405, 31048, 38810, 77620, 155240, 508411, 1016822, 2033644, 2542055, 4067288, 5084110, 10168220, 20336440]

約数ペア:

[(1, 20336440), (2, 10168220), (4, 5084110), (5, 4067288), (8, 2542055), (10, 2033644), (20, 1016822), (40, 508411), (131, 155240), (262, 77620), (524, 38810), (655, 31048), (1048, 19405), (1310, 15524), (2620, 7762), (3881, 5240)]