129426820

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{12421}}^1$

素因数の和:12951

約数の個数: 24

約数和(自身を含む): 272339928

約数和(自身を除く): 142913108

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 2084, 2605, 5210, 10420, 12421, 24842, 49684, 62105, 124210, 248420, 6471341, 12942682, 25885364, 32356705, 64713410, 129426820]

約数ペア:

[(1, 129426820), (2, 64713410), (4, 32356705), (5, 25885364), (10, 12942682), (20, 6471341), (521, 248420), (1042, 124210), (2084, 62105), (2605, 49684), (5210, 24842), (10420, 12421)]