21216105

素因数分解:

$3^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 38301120

約数和(自身を除く): 17085015

約数列:

[1, 3, 5, 9, 15, 45, 59, 61, 131, 177, 183, 295, 305, 393, 531, 549, 655, 885, 915, 1179, 1965, 2655, 2745, 3599, 5895, 7729, 7991, 10797, 17995, 23187, 23973, 32391, 38645, 39955, 53985, 69561, 71919, 115935, 119865, 161955, 347805, 359595, 471469, 1414407, 2357345, 4243221, 7072035, 21216105]

約数ペア:

[(1, 21216105), (3, 7072035), (5, 4243221), (9, 2357345), (15, 1414407), (45, 471469), (59, 359595), (61, 347805), (131, 161955), (177, 119865), (183, 115935), (295, 71919), (305, 69561), (393, 53985), (531, 39955), (549, 38645), (655, 32391), (885, 23973), (915, 23187), (1179, 17995), (1965, 10797), (2655, 7991), (2745, 7729), (3599, 5895)]