18210725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{409}}^1$

素因数の和:569

約数の個数: 24

約数和(自身を含む): 24555720

約数和(自身を除く): 6344995

約数列:

[1, 5, 13, 25, 65, 137, 325, 409, 685, 1781, 2045, 3425, 5317, 8905, 10225, 26585, 44525, 56033, 132925, 280165, 728429, 1400825, 3642145, 18210725]

約数ペア:

[(1, 18210725), (5, 3642145), (13, 1400825), (25, 728429), (65, 280165), (137, 132925), (325, 56033), (409, 44525), (685, 26585), (1781, 10225), (2045, 8905), (3425, 5317)]