21129855

素因数分解:

$3^1\times 5^1\times {\mathrm{571}}^1\times {\mathrm{2467}}^1$

素因数の和:3046

約数の個数: 16

約数和(自身を含む): 33880704

約数和(自身を除く): 12750849

約数列:

[1, 3, 5, 15, 571, 1713, 2467, 2855, 7401, 8565, 12335, 37005, 1408657, 4225971, 7043285, 21129855]

約数ペア:

[(1, 21129855), (3, 7043285), (5, 4225971), (15, 1408657), (571, 37005), (1713, 12335), (2467, 8565), (2855, 7401)]