21247935

素因数分解:

$3^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{2203}}^1$

素因数の和:2854

約数の個数: 16

約数和(自身を含む): 34065024

約数和(自身を除く): 12817089

約数列:

[1, 3, 5, 15, 643, 1929, 2203, 3215, 6609, 9645, 11015, 33045, 1416529, 4249587, 7082645, 21247935]

約数ペア:

[(1, 21247935), (3, 7082645), (5, 4249587), (15, 1416529), (643, 33045), (1929, 11015), (2203, 9645), (3215, 6609)]