21820513

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{461}}^1$

素因数の和:816

約数の個数: 16

約数和(自身を含む): 25768512

約数和(自身を除く): 3947999

約数列:

[1, 11, 13, 143, 331, 461, 3641, 4303, 5071, 5993, 47333, 65923, 152591, 1678501, 1983683, 21820513]

約数ペア:

[(1, 21820513), (11, 1983683), (13, 1678501), (143, 152591), (331, 65923), (461, 47333), (3641, 5993), (4303, 5071)]