21200855

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{5347}}^1$

素因数の和:5426

約数の個数: 16

約数和(自身を含む): 27852384

約数和(自身を除く): 6651529

約数列:

[1, 5, 13, 61, 65, 305, 793, 3965, 5347, 26735, 69511, 326167, 347555, 1630835, 4240171, 21200855]

約数ペア:

[(1, 21200855), (5, 4240171), (13, 1630835), (61, 347555), (65, 326167), (305, 69511), (793, 26735), (3965, 5347)]