19720785

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{3833}}^1$

素因数の和:3862

約数の個数: 32

約数和(自身を含む): 36806400

約数和(自身を除く): 17085615

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 3833, 5145, 11499, 19165, 26831, 57495, 80493, 134155, 187817, 402465, 563451, 939085, 1314719, 2817255, 3944157, 6573595, 19720785]

約数ペア:

[(1, 19720785), (3, 6573595), (5, 3944157), (7, 2817255), (15, 1314719), (21, 939085), (35, 563451), (49, 402465), (105, 187817), (147, 134155), (245, 80493), (343, 57495), (735, 26831), (1029, 19165), (1715, 11499), (3833, 5145)]