81702520

素因数分解:

$2^3\times 5^1\times {\mathrm{1279}}^1\times {\mathrm{1597}}^1$

素因数の和:2887

約数の個数: 32

約数和(自身を含む): 184089600

約数和(自身を除く): 102387080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1279, 1597, 2558, 3194, 5116, 6388, 6395, 7985, 10232, 12776, 12790, 15970, 25580, 31940, 51160, 63880, 2042563, 4085126, 8170252, 10212815, 16340504, 20425630, 40851260, 81702520]

約数ペア:

[(1, 81702520), (2, 40851260), (4, 20425630), (5, 16340504), (8, 10212815), (10, 8170252), (20, 4085126), (40, 2042563), (1279, 63880), (1597, 51160), (2558, 31940), (3194, 25580), (5116, 15970), (6388, 12790), (6395, 12776), (7985, 10232)]