21828

素因数分解:

$2^2\times 3^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1$

素因数の和:131

約数の個数: 24

約数和(自身を含む): 54432

約数和(自身を除く): 32604

約数列:

[1, 2, 3, 4, 6, 12, 17, 34, 51, 68, 102, 107, 204, 214, 321, 428, 642, 1284, 1819, 3638, 5457, 7276, 10914, 21828]

約数ペア:

[(1, 21828), (2, 10914), (3, 7276), (4, 5457), (6, 3638), (12, 1819), (17, 1284), (34, 642), (51, 428), (68, 321), (102, 214), (107, 204)]