21375475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4091}}^1$

素因数の和:4131

約数の個数: 24

約数和(自身を含む): 30444480

約数和(自身を除く): 9069005

約数列:

[1, 5, 11, 19, 25, 55, 95, 209, 275, 475, 1045, 4091, 5225, 20455, 45001, 77729, 102275, 225005, 388645, 855019, 1125025, 1943225, 4275095, 21375475]

約数ペア:

[(1, 21375475), (5, 4275095), (11, 1943225), (19, 1125025), (25, 855019), (55, 388645), (95, 225005), (209, 102275), (275, 77729), (475, 45001), (1045, 20455), (4091, 5225)]