19647025

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{251}}^1$

素因数の和:393

約数の個数: 24

約数和(自身を含む): 25498368

約数和(自身を除く): 5851343

約数列:

[1, 5, 25, 31, 101, 155, 251, 505, 775, 1255, 2525, 3131, 6275, 7781, 15655, 25351, 38905, 78275, 126755, 194525, 633775, 785881, 3929405, 19647025]

約数ペア:

[(1, 19647025), (5, 3929405), (25, 785881), (31, 633775), (101, 194525), (155, 126755), (251, 78275), (505, 38905), (775, 25351), (1255, 15655), (2525, 7781), (3131, 6275)]