21992620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{337}}^1$

素因数の和:610

約数の個数: 48

約数和(自身を含む): 50083488

約数和(自身を除く): 28090868

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 251, 260, 337, 502, 674, 1004, 1255, 1348, 1685, 2510, 3263, 3370, 4381, 5020, 6526, 6740, 8762, 13052, 16315, 17524, 21905, 32630, 43810, 65260, 84587, 87620, 169174, 338348, 422935, 845870, 1099631, 1691740, 2199262, 4398524, 5498155, 10996310, 21992620]

約数ペア:

[(1, 21992620), (2, 10996310), (4, 5498155), (5, 4398524), (10, 2199262), (13, 1691740), (20, 1099631), (26, 845870), (52, 422935), (65, 338348), (130, 169174), (251, 87620), (260, 84587), (337, 65260), (502, 43810), (674, 32630), (1004, 21905), (1255, 17524), (1348, 16315), (1685, 13052), (2510, 8762), (3263, 6740), (3370, 6526), (4381, 5020)]