81512840

素因数分解:

$2^3\times 5^1\times {\mathrm{2037821}}^1$

素因数の和:2037832

約数の個数: 16

約数和(自身を含む): 183403980

約数和(自身を除く): 101891140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2037821, 4075642, 8151284, 10189105, 16302568, 20378210, 40756420, 81512840]

約数ペア:

[(1, 81512840), (2, 40756420), (4, 20378210), (5, 16302568), (8, 10189105), (10, 8151284), (20, 4075642), (40, 2037821)]