18327681

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{263}}^1$

素因数の和:390

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 10184319

約数列:

[1, 3, 9, 27, 29, 87, 89, 261, 263, 267, 783, 789, 801, 2367, 2403, 2581, 7101, 7627, 7743, 22881, 23229, 23407, 68643, 69687, 70221, 205929, 210663, 631989, 678803, 2036409, 6109227, 18327681]

約数ペア:

[(1, 18327681), (3, 6109227), (9, 2036409), (27, 678803), (29, 631989), (87, 210663), (89, 205929), (261, 70221), (263, 69687), (267, 68643), (783, 23407), (789, 23229), (801, 22881), (2367, 7743), (2403, 7627), (2581, 7101)]