21000298491

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{211}}^1\times {\mathrm{443}}^1$

素因数の和:873

約数の個数: 64

約数和(自身を含む): 32124003840

約数和(自身を除く): 11123705349

約数列:

[1, 3, 9, 27, 53, 157, 159, 211, 443, 471, 477, 633, 1329, 1413, 1431, 1899, 3987, 4239, 5697, 8321, 11183, 11961, 23479, 24963, 33127, 33549, 69551, 70437, 74889, 93473, 99381, 100647, 208653, 211311, 224667, 280419, 298143, 301941, 625959, 633933, 841257, 894429, 1755731, 1877877, 2523771, 3686203, 4954069, 5267193, 11058609, 14675261, 14862207, 15801579, 33175827, 44025783, 44586621, 47404737, 99527481, 132077349, 133759863, 396232047, 777788833, 2333366499, 7000099497, 21000298491]

約数ペア:

[(1, 21000298491), (3, 7000099497), (9, 2333366499), (27, 777788833), (53, 396232047), (157, 133759863), (159, 132077349), (211, 99527481), (443, 47404737), (471, 44586621), (477, 44025783), (633, 33175827), (1329, 15801579), (1413, 14862207), (1431, 14675261), (1899, 11058609), (3987, 5267193), (4239, 4954069), (5697, 3686203), (8321, 2523771), (11183, 1877877), (11961, 1755731), (23479, 894429), (24963, 841257), (33127, 633933), (33549, 625959), (69551, 301941), (70437, 298143), (74889, 280419), (93473, 224667), (99381, 211311), (100647, 208653)]