21135471

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{811}}^1$

素因数の和:911

約数の個数: 32

約数和(自身を含む): 34610688

約数和(自身を除く): 13475217

約数列:

[1, 3, 7, 17, 21, 51, 73, 119, 219, 357, 511, 811, 1241, 1533, 2433, 3723, 5677, 8687, 13787, 17031, 26061, 41361, 59203, 96509, 177609, 289527, 414421, 1006451, 1243263, 3019353, 7045157, 21135471]

約数ペア:

[(1, 21135471), (3, 7045157), (7, 3019353), (17, 1243263), (21, 1006451), (51, 414421), (73, 289527), (119, 177609), (219, 96509), (357, 59203), (511, 41361), (811, 26061), (1241, 17031), (1533, 13787), (2433, 8687), (3723, 5677)]