21342980

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5417}}^1$

素因数の和:5623

約数の個数: 24

約数和(自身を含む): 45056088

約数和(自身を除く): 23713108

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 5417, 10834, 21668, 27085, 54170, 108340, 1067149, 2134298, 4268596, 5335745, 10671490, 21342980]

約数ペア:

[(1, 21342980), (2, 10671490), (4, 5335745), (5, 4268596), (10, 2134298), (20, 1067149), (197, 108340), (394, 54170), (788, 27085), (985, 21668), (1970, 10834), (3940, 5417)]