21529340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2521}}^1$

素因数の和:2598

約数の個数: 48

約数和(自身を含む): 52538304

約数和(自身を除く): 31008964

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2521, 4270, 5042, 8540, 10084, 12605, 17647, 25210, 35294, 50420, 70588, 88235, 153781, 176470, 307562, 352940, 615124, 768905, 1076467, 1537810, 2152934, 3075620, 4305868, 5382335, 10764670, 21529340]

約数ペア:

[(1, 21529340), (2, 10764670), (4, 5382335), (5, 4305868), (7, 3075620), (10, 2152934), (14, 1537810), (20, 1076467), (28, 768905), (35, 615124), (61, 352940), (70, 307562), (122, 176470), (140, 153781), (244, 88235), (305, 70588), (427, 50420), (610, 35294), (854, 25210), (1220, 17647), (1708, 12605), (2135, 10084), (2521, 8540), (4270, 5042)]