21271075

素因数分解:

$5^2\times 7^1\times {\mathrm{197}}^1\times {\mathrm{617}}^1$

素因数の和:831

約数の個数: 24

約数和(自身を含む): 30346272

約数和(自身を除く): 9075197

約数列:

[1, 5, 7, 25, 35, 175, 197, 617, 985, 1379, 3085, 4319, 4925, 6895, 15425, 21595, 34475, 107975, 121549, 607745, 850843, 3038725, 4254215, 21271075]

約数ペア:

[(1, 21271075), (5, 4254215), (7, 3038725), (25, 850843), (35, 607745), (175, 121549), (197, 107975), (617, 34475), (985, 21595), (1379, 15425), (3085, 6895), (4319, 4925)]