21706945

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{6301}}^1$

素因数の和:6372

約数の個数: 16

約数和(自身を含む): 28585872

約数和(自身を除く): 6878927

約数列:

[1, 5, 13, 53, 65, 265, 689, 3445, 6301, 31505, 81913, 333953, 409565, 1669765, 4341389, 21706945]

約数ペア:

[(1, 21706945), (5, 4341389), (13, 1669765), (53, 409565), (65, 333953), (265, 81913), (689, 31505), (3445, 6301)]