78261520

素因数分解:

$2^4\times 5^1\times {\mathrm{978269}}^1$

素因数の和:978282

約数の個数: 20

約数和(自身を含む): 181958220

約数和(自身を除く): 103696700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 978269, 1956538, 3913076, 4891345, 7826152, 9782690, 15652304, 19565380, 39130760, 78261520]

約数ペア:

[(1, 78261520), (2, 39130760), (4, 19565380), (5, 15652304), (8, 9782690), (10, 7826152), (16, 4891345), (20, 3913076), (40, 1956538), (80, 978269)]