21357825

素因数分解:

$3^1\times 5^2\times {\mathrm{223}}^1\times {\mathrm{1277}}^1$

素因数の和:1513

約数の個数: 24

約数和(自身を含む): 35497728

約数和(自身を除く): 14139903

約数列:

[1, 3, 5, 15, 25, 75, 223, 669, 1115, 1277, 3345, 3831, 5575, 6385, 16725, 19155, 31925, 95775, 284771, 854313, 1423855, 4271565, 7119275, 21357825]

約数ペア:

[(1, 21357825), (3, 7119275), (5, 4271565), (15, 1423855), (25, 854313), (75, 284771), (223, 95775), (669, 31925), (1115, 19155), (1277, 16725), (3345, 6385), (3831, 5575)]