21091713

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{17981}}^1$

素因数の和:18024

約数の個数: 16

約数和(自身を含む): 31072896

約数和(自身を除く): 9981183

約数列:

[1, 3, 17, 23, 51, 69, 391, 1173, 17981, 53943, 305677, 413563, 917031, 1240689, 7030571, 21091713]

約数ペア:

[(1, 21091713), (3, 7030571), (17, 1240689), (23, 917031), (51, 413563), (69, 305677), (391, 53943), (1173, 17981)]