71721855

素因数分解:

$3^4\times 5^1\times {\mathrm{177091}}^1$

素因数の和:177108

約数の個数: 20

約数和(自身を含む): 128568792

約数和(自身を除く): 56846937

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 177091, 531273, 885455, 1593819, 2656365, 4781457, 7969095, 14344371, 23907285, 71721855]

約数ペア:

[(1, 71721855), (3, 23907285), (5, 14344371), (9, 7969095), (15, 4781457), (27, 2656365), (45, 1593819), (81, 885455), (135, 531273), (405, 177091)]