21111080

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5441}}^1$

素因数の和:5549

約数の個数: 32

約数和(自身を含む): 47998440

約数和(自身を除く): 26887360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5441, 10882, 21764, 27205, 43528, 54410, 108820, 217640, 527777, 1055554, 2111108, 2638885, 4222216, 5277770, 10555540, 21111080]

約数ペア:

[(1, 21111080), (2, 10555540), (4, 5277770), (5, 4222216), (8, 2638885), (10, 2111108), (20, 1055554), (40, 527777), (97, 217640), (194, 108820), (388, 54410), (485, 43528), (776, 27205), (970, 21764), (1940, 10882), (3880, 5441)]