20998868

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{3203}}^1$

素因数の和:3367

約数の個数: 24

約数和(自身を含む): 40370400

約数和(自身を除く): 19371532

約数列:

[1, 2, 4, 11, 22, 44, 149, 298, 596, 1639, 3203, 3278, 6406, 6556, 12812, 35233, 70466, 140932, 477247, 954494, 1908988, 5249717, 10499434, 20998868]

約数ペア:

[(1, 20998868), (2, 10499434), (4, 5249717), (11, 1908988), (22, 954494), (44, 477247), (149, 140932), (298, 70466), (596, 35233), (1639, 12812), (3203, 6556), (3278, 6406)]