78821720

素因数分解:

$2^3\times 5^1\times {\mathrm{1970543}}^1$

素因数の和:1970554

約数の個数: 16

約数和(自身を含む): 177348960

約数和(自身を除く): 98527240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1970543, 3941086, 7882172, 9852715, 15764344, 19705430, 39410860, 78821720]

約数ペア:

[(1, 78821720), (2, 39410860), (4, 19705430), (5, 15764344), (8, 9852715), (10, 7882172), (20, 3941086), (40, 1970543)]