20512251

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:145

約数の個数: 64

約数和(自身を含む): 35251200

約数和(自身を除く): 14738949

約数列:

[1, 3, 9, 17, 23, 27, 29, 51, 67, 69, 87, 153, 201, 207, 261, 391, 459, 493, 603, 621, 667, 783, 1139, 1173, 1479, 1541, 1809, 1943, 2001, 3417, 3519, 4437, 4623, 5829, 6003, 10251, 10557, 11339, 13311, 13869, 17487, 18009, 26197, 30753, 33031, 34017, 41607, 44689, 52461, 78591, 99093, 102051, 134067, 235773, 297279, 306153, 402201, 707319, 759713, 891837, 1206603, 2279139, 6837417, 20512251]

約数ペア:

[(1, 20512251), (3, 6837417), (9, 2279139), (17, 1206603), (23, 891837), (27, 759713), (29, 707319), (51, 402201), (67, 306153), (69, 297279), (87, 235773), (153, 134067), (201, 102051), (207, 99093), (261, 78591), (391, 52461), (459, 44689), (493, 41607), (603, 34017), (621, 33031), (667, 30753), (783, 26197), (1139, 18009), (1173, 17487), (1479, 13869), (1541, 13311), (1809, 11339), (1943, 10557), (2001, 10251), (3417, 6003), (3519, 5829), (4437, 4623)]