21563900

素因数分解:

$2^2\times 5^2\times {\mathrm{191}}^1\times {\mathrm{1129}}^1$

素因数の和:1334

約数の個数: 36

約数和(自身を含む): 47080320

約数和(自身を除く): 25516420

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 191, 382, 764, 955, 1129, 1910, 2258, 3820, 4516, 4775, 5645, 9550, 11290, 19100, 22580, 28225, 56450, 112900, 215639, 431278, 862556, 1078195, 2156390, 4312780, 5390975, 10781950, 21563900]

約数ペア:

[(1, 21563900), (2, 10781950), (4, 5390975), (5, 4312780), (10, 2156390), (20, 1078195), (25, 862556), (50, 431278), (100, 215639), (191, 112900), (382, 56450), (764, 28225), (955, 22580), (1129, 19100), (1910, 11290), (2258, 9550), (3820, 5645), (4516, 4775)]