20170225

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:729

約数の個数: 24

約数和(自身を含む): 26516160

約数和(自身を除く): 6345935

約数列:

[1, 5, 25, 29, 43, 145, 215, 647, 725, 1075, 1247, 3235, 6235, 16175, 18763, 27821, 31175, 93815, 139105, 469075, 695525, 806809, 4034045, 20170225]

約数ペア:

[(1, 20170225), (5, 4034045), (25, 806809), (29, 695525), (43, 469075), (145, 139105), (215, 93815), (647, 31175), (725, 27821), (1075, 18763), (1247, 16175), (3235, 6235)]