19517915

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{3947}}^1$

素因数の和:4018

約数の個数: 16

約数和(自身を含む): 25014528

約数和(自身を除く): 5496613

約数列:

[1, 5, 23, 43, 115, 215, 989, 3947, 4945, 19735, 90781, 169721, 453905, 848605, 3903583, 19517915]

約数ペア:

[(1, 19517915), (5, 3903583), (23, 848605), (43, 453905), (115, 169721), (215, 90781), (989, 19735), (3947, 4945)]