21705855

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{85121}}^1$

素因数の和:85146

約数の個数: 16

約数和(自身を含む): 36772704

約数和(自身を除く): 15066849

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 85121, 255363, 425605, 1276815, 1447057, 4341171, 7235285, 21705855]

約数ペア:

[(1, 21705855), (3, 7235285), (5, 4341171), (15, 1447057), (17, 1276815), (51, 425605), (85, 255363), (255, 85121)]