31391240

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{19141}}^1$

素因数の和:19193

約数の個数: 32

約数和(自身を含む): 72356760

約数和(自身を除く): 40965520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 19141, 38282, 76564, 95705, 153128, 191410, 382820, 765640, 784781, 1569562, 3139124, 3923905, 6278248, 7847810, 15695620, 31391240]

約数ペア:

[(1, 31391240), (2, 15695620), (4, 7847810), (5, 6278248), (8, 3923905), (10, 3139124), (20, 1569562), (40, 784781), (41, 765640), (82, 382820), (164, 191410), (205, 153128), (328, 95705), (410, 76564), (820, 38282), (1640, 19141)]