21389516

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{229}}^1\times {\mathrm{1229}}^1$

素因数の和:1481

約数の個数: 24

約数和(自身を含む): 39606000

約数和(自身を除く): 18216484

約数列:

[1, 2, 4, 19, 38, 76, 229, 458, 916, 1229, 2458, 4351, 4916, 8702, 17404, 23351, 46702, 93404, 281441, 562882, 1125764, 5347379, 10694758, 21389516]

約数ペア:

[(1, 21389516), (2, 10694758), (4, 5347379), (19, 1125764), (38, 562882), (76, 281441), (229, 93404), (458, 46702), (916, 23351), (1229, 17404), (2458, 8702), (4351, 4916)]