21993489

素因数分解:

$3^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 37914240

約数和(自身を除く): 15920751

約数列:

[1, 3, 7, 9, 21, 59, 61, 63, 97, 177, 183, 291, 413, 427, 531, 549, 679, 873, 1239, 1281, 2037, 3599, 3717, 3843, 5723, 5917, 6111, 10797, 17169, 17751, 25193, 32391, 40061, 41419, 51507, 53253, 75579, 120183, 124257, 226737, 349103, 360549, 372771, 1047309, 2443721, 3141927, 7331163, 21993489]

約数ペア:

[(1, 21993489), (3, 7331163), (7, 3141927), (9, 2443721), (21, 1047309), (59, 372771), (61, 360549), (63, 349103), (97, 226737), (177, 124257), (183, 120183), (291, 75579), (413, 53253), (427, 51507), (531, 41419), (549, 40061), (679, 32391), (873, 25193), (1239, 17751), (1281, 17169), (2037, 10797), (3599, 6111), (3717, 5917), (3843, 5723)]