20621180

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{1979}}^1$

素因数の和:2509

約数の個数: 24

約数和(自身を含む): 43409520

約数和(自身を除く): 22788340

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 1979, 2084, 2605, 3958, 5210, 7916, 9895, 10420, 19790, 39580, 1031059, 2062118, 4124236, 5155295, 10310590, 20621180]

約数ペア:

[(1, 20621180), (2, 10310590), (4, 5155295), (5, 4124236), (10, 2062118), (20, 1031059), (521, 39580), (1042, 19790), (1979, 10420), (2084, 9895), (2605, 7916), (3958, 5210)]