21639639

素因数分解:

$3^1\times 7^1\times {\mathrm{569}}^1\times {\mathrm{1811}}^1$

素因数の和:2390

約数の個数: 16

約数和(自身を含む): 33050880

約数和(自身を除く): 11411241

約数列:

[1, 3, 7, 21, 569, 1707, 1811, 3983, 5433, 11949, 12677, 38031, 1030459, 3091377, 7213213, 21639639]

約数ペア:

[(1, 21639639), (3, 7213213), (7, 3091377), (21, 1030459), (569, 38031), (1707, 12677), (1811, 11949), (3983, 5433)]