20712725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{691}}^1$

素因数の和:821

約数の個数: 24

約数和(自身を含む): 28316640

約数和(自身を除く): 7603915

約数列:

[1, 5, 11, 25, 55, 109, 275, 545, 691, 1199, 2725, 3455, 5995, 7601, 17275, 29975, 38005, 75319, 190025, 376595, 828509, 1882975, 4142545, 20712725]

約数ペア:

[(1, 20712725), (5, 4142545), (11, 1882975), (25, 828509), (55, 376595), (109, 190025), (275, 75319), (545, 38005), (691, 29975), (1199, 17275), (2725, 7601), (3455, 5995)]