20664375

素因数分解:

$3^1\times 5^4\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:233

約数の個数: 40

約数和(自身を含む): 35088768

約数和(自身を除く): 14424393

約数列:

[1, 3, 5, 15, 25, 75, 103, 107, 125, 309, 321, 375, 515, 535, 625, 1545, 1605, 1875, 2575, 2675, 7725, 8025, 11021, 12875, 13375, 33063, 38625, 40125, 55105, 64375, 66875, 165315, 193125, 200625, 275525, 826575, 1377625, 4132875, 6888125, 20664375]

約数ペア:

[(1, 20664375), (3, 6888125), (5, 4132875), (15, 1377625), (25, 826575), (75, 275525), (103, 200625), (107, 193125), (125, 165315), (309, 66875), (321, 64375), (375, 55105), (515, 40125), (535, 38625), (625, 33063), (1545, 13375), (1605, 12875), (1875, 11021), (2575, 8025), (2675, 7725)]