21066772

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{163}}^1\times {\mathrm{409}}^1$

素因数の和:655

約数の個数: 24

約数和(自身を含む): 37654400

約数和(自身を除く): 16587628

約数列:

[1, 2, 4, 79, 158, 163, 316, 326, 409, 652, 818, 1636, 12877, 25754, 32311, 51508, 64622, 66667, 129244, 133334, 266668, 5266693, 10533386, 21066772]

約数ペア:

[(1, 21066772), (2, 10533386), (4, 5266693), (79, 266668), (158, 133334), (163, 129244), (316, 66667), (326, 64622), (409, 51508), (652, 32311), (818, 25754), (1636, 12877)]