21648123

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:117

約数の個数: 72

約数和(自身を含む): 40229280

約数和(自身を除く): 18581157

約数列:

[1, 3, 7, 9, 17, 21, 29, 41, 51, 63, 87, 119, 123, 153, 203, 261, 287, 289, 357, 369, 493, 609, 697, 861, 867, 1071, 1189, 1479, 1827, 2023, 2091, 2583, 2601, 3451, 3567, 4437, 4879, 6069, 6273, 8323, 8381, 10353, 10701, 11849, 14637, 18207, 20213, 24969, 25143, 31059, 35547, 43911, 58667, 60639, 74907, 75429, 82943, 106641, 141491, 176001, 181917, 248829, 343621, 424473, 528003, 746487, 1030863, 1273419, 2405347, 3092589, 7216041, 21648123]

約数ペア:

[(1, 21648123), (3, 7216041), (7, 3092589), (9, 2405347), (17, 1273419), (21, 1030863), (29, 746487), (41, 528003), (51, 424473), (63, 343621), (87, 248829), (119, 181917), (123, 176001), (153, 141491), (203, 106641), (261, 82943), (287, 75429), (289, 74907), (357, 60639), (369, 58667), (493, 43911), (609, 35547), (697, 31059), (861, 25143), (867, 24969), (1071, 20213), (1189, 18207), (1479, 14637), (1827, 11849), (2023, 10701), (2091, 10353), (2583, 8381), (2601, 8323), (3451, 6273), (3567, 6069), (4437, 4879)]