21250593

素因数分解:

$3^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2$

素因数の和:97

約数の個数: 72

約数和(自身を含む): 40482624

約数和(自身を除く): 19232031

約数列:

[1, 3, 7, 9, 13, 21, 27, 31, 39, 63, 81, 91, 93, 117, 189, 217, 243, 273, 279, 351, 403, 567, 651, 819, 837, 961, 1053, 1209, 1701, 1953, 2457, 2511, 2821, 2883, 3159, 3627, 5859, 6727, 7371, 7533, 8463, 8649, 10881, 12493, 17577, 20181, 22113, 25389, 25947, 32643, 37479, 52731, 60543, 76167, 77841, 87451, 97929, 112437, 181629, 228501, 233523, 262353, 337311, 544887, 685503, 787059, 1011933, 1634661, 2361177, 3035799, 7083531, 21250593]

約数ペア:

[(1, 21250593), (3, 7083531), (7, 3035799), (9, 2361177), (13, 1634661), (21, 1011933), (27, 787059), (31, 685503), (39, 544887), (63, 337311), (81, 262353), (91, 233523), (93, 228501), (117, 181629), (189, 112437), (217, 97929), (243, 87451), (273, 77841), (279, 76167), (351, 60543), (403, 52731), (567, 37479), (651, 32643), (819, 25947), (837, 25389), (961, 22113), (1053, 20181), (1209, 17577), (1701, 12493), (1953, 10881), (2457, 8649), (2511, 8463), (2821, 7533), (2883, 7371), (3159, 6727), (3627, 5859)]