18914575

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 24294080

約数和(自身を除く): 5379505

約数列:

[1, 5, 25, 61, 79, 157, 305, 395, 785, 1525, 1975, 3925, 4819, 9577, 12403, 24095, 47885, 62015, 120475, 239425, 310075, 756583, 3782915, 18914575]

約数ペア:

[(1, 18914575), (5, 3782915), (25, 756583), (61, 310075), (79, 239425), (157, 120475), (305, 62015), (395, 47885), (785, 24095), (1525, 12403), (1975, 9577), (3925, 4819)]