21672639

素因数分解:

$3^2\times {\mathrm{37}}^2\times {\mathrm{1759}}^1$

素因数の和:1839

約数の個数: 18

約数和(自身を含む): 32192160

約数和(自身を除く): 10519521

約数列:

[1, 3, 9, 37, 111, 333, 1369, 1759, 4107, 5277, 12321, 15831, 65083, 195249, 585747, 2408071, 7224213, 21672639]

約数ペア:

[(1, 21672639), (3, 7224213), (9, 2408071), (37, 585747), (111, 195249), (333, 65083), (1369, 15831), (1759, 12321), (4107, 5277)]