21916655

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{401}}^1\times {\mathrm{643}}^1$

素因数の和:1066

約数の個数: 16

約数和(自身を含む): 27959904

約数和(自身を除く): 6043249

約数列:

[1, 5, 17, 85, 401, 643, 2005, 3215, 6817, 10931, 34085, 54655, 257843, 1289215, 4383331, 21916655]

約数ペア:

[(1, 21916655), (5, 4383331), (17, 1289215), (85, 257843), (401, 54655), (643, 34085), (2005, 10931), (3215, 6817)]