21021880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47777}}^1$

素因数の和:47799

約数の個数: 32

約数和(自身を含む): 51600240

約数和(自身を除く): 30578360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47777, 95554, 191108, 238885, 382216, 477770, 525547, 955540, 1051094, 1911080, 2102188, 2627735, 4204376, 5255470, 10510940, 21021880]

約数ペア:

[(1, 21021880), (2, 10510940), (4, 5255470), (5, 4204376), (8, 2627735), (10, 2102188), (11, 1911080), (20, 1051094), (22, 955540), (40, 525547), (44, 477770), (55, 382216), (88, 238885), (110, 191108), (220, 95554), (440, 47777)]