21021095

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{1109}}^1$

素因数の和:1354

約数の個数: 16

約数和(自身を含む): 26853120

約数和(自身を除く): 5832025

約数列:

[1, 5, 17, 85, 223, 1109, 1115, 3791, 5545, 18853, 18955, 94265, 247307, 1236535, 4204219, 21021095]

約数ペア:

[(1, 21021095), (5, 4204219), (17, 1236535), (85, 247307), (223, 94265), (1109, 18955), (1115, 18853), (3791, 5545)]