21137745

素因数分解:

$3^1\times 5^1\times {\mathrm{443}}^1\times {\mathrm{3181}}^1$

素因数の和:3632

約数の個数: 16

約数和(自身を含む): 33907392

約数和(自身を除く): 12769647

約数列:

[1, 3, 5, 15, 443, 1329, 2215, 3181, 6645, 9543, 15905, 47715, 1409183, 4227549, 7045915, 21137745]

約数ペア:

[(1, 21137745), (3, 7045915), (5, 4227549), (15, 1409183), (443, 47715), (1329, 15905), (2215, 9543), (3181, 6645)]