21856916

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{2069}}^1$

素因数の和:2231

約数の個数: 24

約数和(自身を含む): 40572000

約数和(自身を除く): 18715084

約数列:

[1, 2, 4, 19, 38, 76, 139, 278, 556, 2069, 2641, 4138, 5282, 8276, 10564, 39311, 78622, 157244, 287591, 575182, 1150364, 5464229, 10928458, 21856916]

約数ペア:

[(1, 21856916), (2, 10928458), (4, 5464229), (19, 1150364), (38, 575182), (76, 287591), (139, 157244), (278, 78622), (556, 39311), (2069, 10564), (2641, 8276), (4138, 5282)]