64572920

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{3947}}^1$

素因数の和:4367

約数の個数: 32

約数和(自身を含む): 145681200

約数和(自身を除く): 81108280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 3947, 4090, 7894, 8180, 15788, 16360, 19735, 31576, 39470, 78940, 157880, 1614323, 3228646, 6457292, 8071615, 12914584, 16143230, 32286460, 64572920]

約数ペア:

[(1, 64572920), (2, 32286460), (4, 16143230), (5, 12914584), (8, 8071615), (10, 6457292), (20, 3228646), (40, 1614323), (409, 157880), (818, 78940), (1636, 39470), (2045, 31576), (3272, 19735), (3947, 16360), (4090, 15788), (7894, 8180)]