20982975

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{21521}}^1$

素因数の和:21547

約数の個数: 24

約数和(自身を含む): 37362192

約数和(自身を除く): 16379217

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975, 21521, 64563, 107605, 279773, 322815, 538025, 839319, 1398865, 1614075, 4196595, 6994325, 20982975]

約数ペア:

[(1, 20982975), (3, 6994325), (5, 4196595), (13, 1614075), (15, 1398865), (25, 839319), (39, 538025), (65, 322815), (75, 279773), (195, 107605), (325, 64563), (975, 21521)]