21790505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{2659}}^1$

素因数の和:2824

約数の個数: 16

約数和(自身を含む): 28728000

約数和(自身を除く): 6937495

約数列:

[1, 5, 11, 55, 149, 745, 1639, 2659, 8195, 13295, 29249, 146245, 396191, 1980955, 4358101, 21790505]

約数ペア:

[(1, 21790505), (5, 4358101), (11, 1980955), (55, 396191), (149, 146245), (745, 29249), (1639, 13295), (2659, 8195)]