21684607

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{271}}^1$

素因数の和:379

約数の個数: 24

約数和(自身を含む): 26790912

約数和(自身を除く): 5106305

約数列:

[1, 7, 23, 49, 71, 161, 271, 497, 1127, 1633, 1897, 3479, 6233, 11431, 13279, 19241, 43631, 80017, 134687, 305417, 442543, 942809, 3097801, 21684607]

約数ペア:

[(1, 21684607), (7, 3097801), (23, 942809), (49, 442543), (71, 305417), (161, 134687), (271, 80017), (497, 43631), (1127, 19241), (1633, 13279), (1897, 11431), (3479, 6233)]