21665180

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7907}}^1$

素因数の和:8053

約数の個数: 24

約数和(自身を含む): 45834768

約数和(自身を除く): 24169588

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7907, 15814, 31628, 39535, 79070, 158140, 1083259, 2166518, 4333036, 5416295, 10832590, 21665180]

約数ペア:

[(1, 21665180), (2, 10832590), (4, 5416295), (5, 4333036), (10, 2166518), (20, 1083259), (137, 158140), (274, 79070), (548, 39535), (685, 31628), (1370, 15814), (2740, 7907)]