81211880

素因数分解:

$2^3\times 5^1\times {\mathrm{347}}^1\times {\mathrm{5851}}^1$

素因数の和:6209

約数の個数: 32

約数和(自身を含む): 183284640

約数和(自身を除く): 102072760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 347, 694, 1388, 1735, 2776, 3470, 5851, 6940, 11702, 13880, 23404, 29255, 46808, 58510, 117020, 234040, 2030297, 4060594, 8121188, 10151485, 16242376, 20302970, 40605940, 81211880]

約数ペア:

[(1, 81211880), (2, 40605940), (4, 20302970), (5, 16242376), (8, 10151485), (10, 8121188), (20, 4060594), (40, 2030297), (347, 234040), (694, 117020), (1388, 58510), (1735, 46808), (2776, 29255), (3470, 23404), (5851, 13880), (6940, 11702)]