21691188

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{263}}^1$

素因数の和:381

約数の個数: 72

約数和(自身を含む): 57657600

約数和(自身を除く): 35966412

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 36, 58, 79, 87, 116, 158, 174, 237, 261, 263, 316, 348, 474, 522, 526, 711, 789, 948, 1044, 1052, 1422, 1578, 2291, 2367, 2844, 3156, 4582, 4734, 6873, 7627, 9164, 9468, 13746, 15254, 20619, 20777, 22881, 27492, 30508, 41238, 41554, 45762, 62331, 68643, 82476, 83108, 91524, 124662, 137286, 186993, 249324, 274572, 373986, 602533, 747972, 1205066, 1807599, 2410132, 3615198, 5422797, 7230396, 10845594, 21691188]

約数ペア:

[(1, 21691188), (2, 10845594), (3, 7230396), (4, 5422797), (6, 3615198), (9, 2410132), (12, 1807599), (18, 1205066), (29, 747972), (36, 602533), (58, 373986), (79, 274572), (87, 249324), (116, 186993), (158, 137286), (174, 124662), (237, 91524), (261, 83108), (263, 82476), (316, 68643), (348, 62331), (474, 45762), (522, 41554), (526, 41238), (711, 30508), (789, 27492), (948, 22881), (1044, 20777), (1052, 20619), (1422, 15254), (1578, 13746), (2291, 9468), (2367, 9164), (2844, 7627), (3156, 6873), (4582, 4734)]