21711819

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1\times {\mathrm{991}}^1$

素因数の和:1170

約数の個数: 16

約数和(自身を含む): 29680640

約数和(自身を除く): 7968821

約数列:

[1, 3, 67, 109, 201, 327, 991, 2973, 7303, 21909, 66397, 108019, 199191, 324057, 7237273, 21711819]

約数ペア:

[(1, 21711819), (3, 7237273), (67, 324057), (109, 199191), (201, 108019), (327, 66397), (991, 21909), (2973, 7303)]