19727905

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{10091}}^1$

素因数の和:10136

約数の個数: 16

約数和(自身を含む): 26158464

約数和(自身を除く): 6430559

約数列:

[1, 5, 17, 23, 85, 115, 391, 1955, 10091, 50455, 171547, 232093, 857735, 1160465, 3945581, 19727905]

約数ペア:

[(1, 19727905), (5, 3945581), (17, 1160465), (23, 857735), (85, 232093), (115, 171547), (391, 50455), (1955, 10091)]