81420980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{140381}}^1$

素因数の和:140419

約数の個数: 24

約数和(自身を含む): 176881320

約数和(自身を除く): 95460340

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 140381, 280762, 561524, 701905, 1403810, 2807620, 4071049, 8142098, 16284196, 20355245, 40710490, 81420980]

約数ペア:

[(1, 81420980), (2, 40710490), (4, 20355245), (5, 16284196), (10, 8142098), (20, 4071049), (29, 2807620), (58, 1403810), (116, 701905), (145, 561524), (290, 280762), (580, 140381)]