20178580

素因数分解:

$2^2\times 5^1\times {\mathrm{659}}^1\times {\mathrm{1531}}^1$

素因数の和:2199

約数の個数: 24

約数和(自身を含む): 42467040

約数和(自身を除く): 22288460

約数列:

[1, 2, 4, 5, 10, 20, 659, 1318, 1531, 2636, 3062, 3295, 6124, 6590, 7655, 13180, 15310, 30620, 1008929, 2017858, 4035716, 5044645, 10089290, 20178580]

約数ペア:

[(1, 20178580), (2, 10089290), (4, 5044645), (5, 4035716), (10, 2017858), (20, 1008929), (659, 30620), (1318, 15310), (1531, 13180), (2636, 7655), (3062, 6590), (3295, 6124)]