21261225

素因数分解:

$3^1\times 5^2\times {\mathrm{197}}^1\times {\mathrm{1439}}^1$

素因数の和:1649

約数の個数: 24

約数和(自身を含む): 35354880

約数和(自身を除く): 14093655

約数列:

[1, 3, 5, 15, 25, 75, 197, 591, 985, 1439, 2955, 4317, 4925, 7195, 14775, 21585, 35975, 107925, 283483, 850449, 1417415, 4252245, 7087075, 21261225]

約数ペア:

[(1, 21261225), (3, 7087075), (5, 4252245), (15, 1417415), (25, 850449), (75, 283483), (197, 107925), (591, 35975), (985, 21585), (1439, 14775), (2955, 7195), (4317, 4925)]