21749855

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{2459}}^1$

素因数の和:2554

約数の個数: 16

約数和(自身を含む): 27453600

約数和(自身を除く): 5703745

約数列:

[1, 5, 29, 61, 145, 305, 1769, 2459, 8845, 12295, 71311, 149999, 356555, 749995, 4349971, 21749855]

約数ペア:

[(1, 21749855), (5, 4349971), (29, 749995), (61, 356555), (145, 149999), (305, 71311), (1769, 12295), (2459, 8845)]