79740020

素因数分解:

$2^2\times 5^1\times {\mathrm{3987001}}^1$

素因数の和:3987010

約数の個数: 12

約数和(自身を含む): 167454084

約数和(自身を除く): 87714064

約数列:

[1, 2, 4, 5, 10, 20, 3987001, 7974002, 15948004, 19935005, 39870010, 79740020]

約数ペア:

[(1, 79740020), (2, 39870010), (4, 19935005), (5, 15948004), (10, 7974002), (20, 3987001)]