20900390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{2351}}^1$

素因数の和:2492

約数の個数: 32

約数和(自身を含む): 43352064

約数和(自身を除く): 22451674

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 127, 254, 635, 889, 1270, 1778, 2351, 4445, 4702, 8890, 11755, 16457, 23510, 32914, 82285, 164570, 298577, 597154, 1492885, 2090039, 2985770, 4180078, 10450195, 20900390]

約数ペア:

[(1, 20900390), (2, 10450195), (5, 4180078), (7, 2985770), (10, 2090039), (14, 1492885), (35, 597154), (70, 298577), (127, 164570), (254, 82285), (635, 32914), (889, 23510), (1270, 16457), (1778, 11755), (2351, 8890), (4445, 4702)]