21129815

素因数分解:

$5^1\times 7^1\times {\mathrm{569}}^1\times {\mathrm{1061}}^1$

素因数の和:1642

約数の個数: 16

約数和(自身を含む): 29056320

約数和(自身を除く): 7926505

約数列:

[1, 5, 7, 35, 569, 1061, 2845, 3983, 5305, 7427, 19915, 37135, 603709, 3018545, 4225963, 21129815]

約数ペア:

[(1, 21129815), (5, 4225963), (7, 3018545), (35, 603709), (569, 37135), (1061, 19915), (2845, 7427), (3983, 5305)]