640590447

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1794371}}^1$

素因数の和:1794398

約数の個数: 16

約数和(自身を含む): 1033558272

約数和(自身を除く): 392967825

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 1794371, 5383113, 12560597, 30504307, 37681791, 91512921, 213530149, 640590447]

約数ペア:

[(1, 640590447), (3, 213530149), (7, 91512921), (17, 37681791), (21, 30504307), (51, 12560597), (119, 5383113), (357, 1794371)]