28087839

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{431}}^1\times {\mathrm{557}}^1$

素因数の和:1007

約数の個数: 24

約数和(自身を含む): 43872192

約数和(自身を除く): 15784353

約数列:

[1, 3, 9, 13, 39, 117, 431, 557, 1293, 1671, 3879, 5013, 5603, 7241, 16809, 21723, 50427, 65169, 240067, 720201, 2160603, 3120871, 9362613, 28087839]

約数ペア:

[(1, 28087839), (3, 9362613), (9, 3120871), (13, 2160603), (39, 720201), (117, 240067), (431, 65169), (557, 50427), (1293, 21723), (1671, 16809), (3879, 7241), (5013, 5603)]