21203225

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{251}}^1$

素因数の和:401

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 6295015

約数列:

[1, 5, 25, 31, 109, 155, 251, 545, 775, 1255, 2725, 3379, 6275, 7781, 16895, 27359, 38905, 84475, 136795, 194525, 683975, 848129, 4240645, 21203225]

約数ペア:

[(1, 21203225), (5, 4240645), (25, 848129), (31, 683975), (109, 194525), (155, 136795), (251, 84475), (545, 38905), (775, 27359), (1255, 16895), (2725, 7781), (3379, 6275)]