21516825

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{2371}}^1$

素因数の和:2406

約数の個数: 36

約数和(自身を含む): 39119024

約数和(自身を除く): 17602199

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 121, 165, 275, 363, 605, 825, 1815, 2371, 3025, 7113, 9075, 11855, 26081, 35565, 59275, 78243, 130405, 177825, 286891, 391215, 652025, 860673, 1434455, 1956075, 4303365, 7172275, 21516825]

約数ペア:

[(1, 21516825), (3, 7172275), (5, 4303365), (11, 1956075), (15, 1434455), (25, 860673), (33, 652025), (55, 391215), (75, 286891), (121, 177825), (165, 130405), (275, 78243), (363, 59275), (605, 35565), (825, 26081), (1815, 11855), (2371, 9075), (3025, 7113)]