21969110

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27809}}^1$

素因数の和:27895

約数の個数: 16

約数和(自身を含む): 40046400

約数和(自身を除く): 18077290

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27809, 55618, 139045, 278090, 2196911, 4393822, 10984555, 21969110]

約数ペア:

[(1, 21969110), (2, 10984555), (5, 4393822), (10, 2196911), (79, 278090), (158, 139045), (395, 55618), (790, 27809)]