20975740

素因数分解:

$2^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1621}}^1$

素因数の和:2277

約数の個数: 24

約数和(自身を含む): 44144352

約数和(自身を除く): 23168612

約数列:

[1, 2, 4, 5, 10, 20, 647, 1294, 1621, 2588, 3235, 3242, 6470, 6484, 8105, 12940, 16210, 32420, 1048787, 2097574, 4195148, 5243935, 10487870, 20975740]

約数ペア:

[(1, 20975740), (2, 10487870), (4, 5243935), (5, 4195148), (10, 2097574), (20, 1048787), (647, 32420), (1294, 16210), (1621, 12940), (2588, 8105), (3235, 6484), (3242, 6470)]