21120765

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{857}}^1$

素因数の和:949

約数の個数: 32

約数和(自身を含む): 35582976

約数和(自身を除く): 14462211

約数列:

[1, 3, 5, 15, 31, 53, 93, 155, 159, 265, 465, 795, 857, 1643, 2571, 4285, 4929, 8215, 12855, 24645, 26567, 45421, 79701, 132835, 136263, 227105, 398505, 681315, 1408051, 4224153, 7040255, 21120765]

約数ペア:

[(1, 21120765), (3, 7040255), (5, 4224153), (15, 1408051), (31, 681315), (53, 398505), (93, 227105), (155, 136263), (159, 132835), (265, 79701), (465, 45421), (795, 26567), (857, 24645), (1643, 12855), (2571, 8215), (4285, 4929)]