21208575

素因数分解:

$3^1\times 5^2\times {\mathrm{83}}^1\times {\mathrm{3407}}^1$

素因数の和:3503

約数の個数: 24

約数和(自身を含む): 35497728

約数和(自身を除く): 14289153

約数列:

[1, 3, 5, 15, 25, 75, 83, 249, 415, 1245, 2075, 3407, 6225, 10221, 17035, 51105, 85175, 255525, 282781, 848343, 1413905, 4241715, 7069525, 21208575]

約数ペア:

[(1, 21208575), (3, 7069525), (5, 4241715), (15, 1413905), (25, 848343), (75, 282781), (83, 255525), (249, 85175), (415, 51105), (1245, 17035), (2075, 10221), (3407, 6225)]