28021021

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1\times {\mathrm{479}}^1$

素因数の和:684

約数の個数: 16

約数和(自身を含む): 32855040

約数和(自身を除く): 4834019

約数列:

[1, 7, 61, 137, 427, 479, 959, 3353, 8357, 29219, 58499, 65623, 204533, 459361, 4003003, 28021021]

約数ペア:

[(1, 28021021), (7, 4003003), (61, 459361), (137, 204533), (427, 65623), (479, 58499), (959, 29219), (3353, 8357)]