18987199

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{773}}^1$

素因数の和:831

約数の個数: 24

約数和(自身を含む): 24706080

約数和(自身を除く): 5718881

約数列:

[1, 7, 11, 29, 77, 121, 203, 319, 773, 847, 2233, 3509, 5411, 8503, 22417, 24563, 59521, 93533, 156919, 246587, 654731, 1726109, 2712457, 18987199]

約数ペア:

[(1, 18987199), (7, 2712457), (11, 1726109), (29, 654731), (77, 246587), (121, 156919), (203, 93533), (319, 59521), (773, 24563), (847, 22417), (2233, 8503), (3509, 5411)]