21100825

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{379}}^1$

素因数の和:537

約数の個数: 24

約数和(自身を含む): 27989280

約数和(自身を除く): 6888455

約数列:

[1, 5, 17, 25, 85, 131, 379, 425, 655, 1895, 2227, 3275, 6443, 9475, 11135, 32215, 49649, 55675, 161075, 248245, 844033, 1241225, 4220165, 21100825]

約数ペア:

[(1, 21100825), (5, 4220165), (17, 1241225), (25, 844033), (85, 248245), (131, 161075), (379, 55675), (425, 49649), (655, 32215), (1895, 11135), (2227, 9475), (3275, 6443)]