20807875

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{409}}^1$

素因数の和:472

約数の個数: 32

約数和(自身を含む): 29165760

約数和(自身を除く): 8357885

約数列:

[1, 5, 11, 25, 37, 55, 125, 185, 275, 407, 409, 925, 1375, 2035, 2045, 4499, 4625, 10175, 10225, 15133, 22495, 50875, 51125, 75665, 112475, 166463, 378325, 562375, 832315, 1891625, 4161575, 20807875]

約数ペア:

[(1, 20807875), (5, 4161575), (11, 1891625), (25, 832315), (37, 562375), (55, 378325), (125, 166463), (185, 112475), (275, 75665), (407, 51125), (409, 50875), (925, 22495), (1375, 15133), (2035, 10225), (2045, 10175), (4499, 4625)]