18780021

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{1063}}^1$

素因数の和:1233

約数の個数: 24

約数和(自身を含む): 29434496

約数和(自身を除く): 10654475

約数列:

[1, 3, 9, 13, 39, 117, 151, 453, 1063, 1359, 1963, 3189, 5889, 9567, 13819, 17667, 41457, 124371, 160513, 481539, 1444617, 2086669, 6260007, 18780021]

約数ペア:

[(1, 18780021), (3, 6260007), (9, 2086669), (13, 1444617), (39, 481539), (117, 160513), (151, 124371), (453, 41457), (1063, 17667), (1359, 13819), (1963, 9567), (3189, 5889)]