861575

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{241}}^1$

素因数の和:275

約数の個数: 24

約数和(自身を含む): 1260336

約数和(自身を除く): 398761

約数列:

[1, 5, 11, 13, 25, 55, 65, 143, 241, 275, 325, 715, 1205, 2651, 3133, 3575, 6025, 13255, 15665, 34463, 66275, 78325, 172315, 861575]

約数ペア:

[(1, 861575), (5, 172315), (11, 78325), (13, 66275), (25, 34463), (55, 15665), (65, 13255), (143, 6025), (241, 3575), (275, 3133), (325, 2651), (715, 1205)]