20481981

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{211}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 31342080

約数和(自身を除く): 10860099

約数列:

[1, 3, 13, 19, 39, 57, 131, 211, 247, 393, 633, 741, 1703, 2489, 2743, 4009, 5109, 7467, 8229, 12027, 27641, 32357, 52117, 82923, 97071, 156351, 359333, 525179, 1077999, 1575537, 6827327, 20481981]

約数ペア:

[(1, 20481981), (3, 6827327), (13, 1575537), (19, 1077999), (39, 525179), (57, 359333), (131, 156351), (211, 97071), (247, 82923), (393, 52117), (633, 32357), (741, 27641), (1703, 12027), (2489, 8229), (2743, 7467), (4009, 5109)]