20280825

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{3919}}^1$

素因数の和:3958

約数の個数: 36

約数和(自身を含む): 37914240

約数和(自身を除く): 17633415

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 3919, 5175, 11757, 19595, 35271, 58785, 90137, 97975, 176355, 270411, 293925, 450685, 811233, 881775, 1352055, 2253425, 4056165, 6760275, 20280825]

約数ペア:

[(1, 20280825), (3, 6760275), (5, 4056165), (9, 2253425), (15, 1352055), (23, 881775), (25, 811233), (45, 450685), (69, 293925), (75, 270411), (115, 176355), (207, 97975), (225, 90137), (345, 58785), (575, 35271), (1035, 19595), (1725, 11757), (3919, 5175)]