21380156

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{33199}}^1$

素因数の和:33233

約数の個数: 24

約数和(自身を含む): 44620800

約数和(自身を除く): 23240644

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644, 33199, 66398, 132796, 232393, 464786, 763577, 929572, 1527154, 3054308, 5345039, 10690078, 21380156]

約数ペア:

[(1, 21380156), (2, 10690078), (4, 5345039), (7, 3054308), (14, 1527154), (23, 929572), (28, 763577), (46, 464786), (92, 232393), (161, 132796), (322, 66398), (644, 33199)]