405439420

素因数分解:

$2^2\times 5^1\times {\mathrm{1531}}^1\times {\mathrm{13241}}^1$

素因数の和:14781

約数の個数: 24

約数和(自身を含む): 852043248

約数和(自身を除く): 446603828

約数列:

[1, 2, 4, 5, 10, 20, 1531, 3062, 6124, 7655, 13241, 15310, 26482, 30620, 52964, 66205, 132410, 264820, 20271971, 40543942, 81087884, 101359855, 202719710, 405439420]

約数ペア:

[(1, 405439420), (2, 202719710), (4, 101359855), (5, 81087884), (10, 40543942), (20, 20271971), (1531, 264820), (3062, 132410), (6124, 66205), (7655, 52964), (13241, 30620), (15310, 26482)]