20151999

素因数分解:

$3^2\times 7^1\times {\mathrm{179}}^1\times {\mathrm{1787}}^1$

素因数の和:1979

約数の個数: 24

約数和(自身を含む): 33471360

約数和(自身を除く): 13319361

約数列:

[1, 3, 7, 9, 21, 63, 179, 537, 1253, 1611, 1787, 3759, 5361, 11277, 12509, 16083, 37527, 112581, 319873, 959619, 2239111, 2878857, 6717333, 20151999]

約数ペア:

[(1, 20151999), (3, 6717333), (7, 2878857), (9, 2239111), (21, 959619), (63, 319873), (179, 112581), (537, 37527), (1253, 16083), (1611, 12509), (1787, 11277), (3759, 5361)]