21421545

素因数分解:

$3^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{2221}}^1$

素因数の和:2872

約数の個数: 16

約数和(自身を含む): 34343232

約数和(自身を除く): 12921687

約数列:

[1, 3, 5, 15, 643, 1929, 2221, 3215, 6663, 9645, 11105, 33315, 1428103, 4284309, 7140515, 21421545]

約数ペア:

[(1, 21421545), (3, 7140515), (5, 4284309), (15, 1428103), (643, 33315), (1929, 11105), (2221, 9645), (3215, 6663)]