21200980

素因数分解:

$2^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{9907}}^1$

素因数の和:10023

約数の個数: 24

約数和(自身を含む): 44942688

約数和(自身を除く): 23741708

約数列:

[1, 2, 4, 5, 10, 20, 107, 214, 428, 535, 1070, 2140, 9907, 19814, 39628, 49535, 99070, 198140, 1060049, 2120098, 4240196, 5300245, 10600490, 21200980]

約数ペア:

[(1, 21200980), (2, 10600490), (4, 5300245), (5, 4240196), (10, 2120098), (20, 1060049), (107, 198140), (214, 99070), (428, 49535), (535, 39628), (1070, 19814), (2140, 9907)]