21806421

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{11411}}^1$

素因数の和:11441

約数の個数: 24

約数和(自身を含む): 36427104

約数和(自身を除く): 14620683

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 11411, 34233, 79877, 148343, 239631, 445029, 559139, 1038401, 1677417, 3115203, 7268807, 21806421]

約数ペア:

[(1, 21806421), (3, 7268807), (7, 3115203), (13, 1677417), (21, 1038401), (39, 559139), (49, 445029), (91, 239631), (147, 148343), (273, 79877), (637, 34233), (1911, 11411)]