21032655

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11783}}^1$

素因数の和:11815

約数の個数: 32

約数和(自身を含む): 40725504

約数和(自身を除く): 19692849

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11783, 35349, 58915, 82481, 176745, 200311, 247443, 412405, 600933, 1001555, 1237215, 1402177, 3004665, 4206531, 7010885, 21032655]

約数ペア:

[(1, 21032655), (3, 7010885), (5, 4206531), (7, 3004665), (15, 1402177), (17, 1237215), (21, 1001555), (35, 600933), (51, 412405), (85, 247443), (105, 200311), (119, 176745), (255, 82481), (357, 58915), (595, 35349), (1785, 11783)]