21000901235

素因数分解:

$5^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1\times {\mathrm{223}}^1\times {\mathrm{1709}}^1$

素因数の和:2147

約数の個数: 32

約数和(自身を含む): 25813831680

約数和(自身を除く): 4812930445

約数列:

[1, 5, 103, 107, 223, 515, 535, 1115, 1709, 8545, 11021, 22969, 23861, 55105, 114845, 119305, 176027, 182863, 381107, 880135, 914315, 1905535, 2457683, 12288415, 18834889, 39254021, 40778449, 94174445, 196270105, 203892245, 4200180247, 21000901235]

約数ペア:

[(1, 21000901235), (5, 4200180247), (103, 203892245), (107, 196270105), (223, 94174445), (515, 40778449), (535, 39254021), (1115, 18834889), (1709, 12288415), (8545, 2457683), (11021, 1905535), (22969, 914315), (23861, 880135), (55105, 381107), (114845, 182863), (119305, 176027)]