78816520

素因数分解:

$2^3\times 5^1\times {\mathrm{1970413}}^1$

素因数の和:1970424

約数の個数: 16

約数和(自身を含む): 177337260

約数和(自身を除く): 98520740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1970413, 3940826, 7881652, 9852065, 15763304, 19704130, 39408260, 78816520]

約数ペア:

[(1, 78816520), (2, 39408260), (4, 19704130), (5, 15763304), (8, 9852065), (10, 7881652), (20, 3940826), (40, 1970413)]