21713289

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{113}}^1\times {\mathrm{379}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 31710240

約数和(自身を除く): 9996951

約数列:

[1, 3, 13, 39, 113, 169, 339, 379, 507, 1137, 1469, 4407, 4927, 14781, 19097, 42827, 57291, 64051, 128481, 192153, 556751, 1670253, 7237763, 21713289]

約数ペア:

[(1, 21713289), (3, 7237763), (13, 1670253), (39, 556751), (113, 192153), (169, 128481), (339, 64051), (379, 57291), (507, 42827), (1137, 19097), (1469, 14781), (4407, 4927)]