20914915

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{4493}}^1$

素因数の和:4531

約数の個数: 24

約数和(自身を含む): 30738960

約数和(自身を除く): 9824045

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 665, 931, 4493, 4655, 22465, 31451, 85367, 157255, 220157, 426835, 597569, 1100785, 2987845, 4182983, 20914915]

約数ペア:

[(1, 20914915), (5, 4182983), (7, 2987845), (19, 1100785), (35, 597569), (49, 426835), (95, 220157), (133, 157255), (245, 85367), (665, 31451), (931, 22465), (4493, 4655)]