81390440

素因数分解:

$2^3\times 5^1\times {\mathrm{2034761}}^1$

素因数の和:2034772

約数の個数: 16

約数和(自身を含む): 183128580

約数和(自身を除く): 101738140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2034761, 4069522, 8139044, 10173805, 16278088, 20347610, 40695220, 81390440]

約数ペア:

[(1, 81390440), (2, 40695220), (4, 20347610), (5, 16278088), (8, 10173805), (10, 8139044), (20, 4069522), (40, 2034761)]