21565025

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:329

約数の個数: 24

約数和(自身を含む): 27676800

約数和(自身を除く): 6111775

約数列:

[1, 5, 25, 61, 79, 179, 305, 395, 895, 1525, 1975, 4475, 4819, 10919, 14141, 24095, 54595, 70705, 120475, 272975, 353525, 862601, 4313005, 21565025]

約数ペア:

[(1, 21565025), (5, 4313005), (25, 862601), (61, 353525), (79, 272975), (179, 120475), (305, 70705), (395, 54595), (895, 24095), (1525, 14141), (1975, 10919), (4475, 4819)]