21254961

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{113}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 36049536

約数和(自身を除く): 14794575

約数列:

[1, 3, 7, 13, 21, 39, 53, 91, 113, 159, 169, 273, 339, 371, 507, 689, 791, 1113, 1183, 1469, 2067, 2373, 3549, 4407, 4823, 5989, 8957, 10283, 14469, 17967, 19097, 26871, 30849, 41923, 57291, 62699, 77857, 125769, 133679, 188097, 233571, 401037, 544999, 1012141, 1634997, 3036423, 7084987, 21254961]

約数ペア:

[(1, 21254961), (3, 7084987), (7, 3036423), (13, 1634997), (21, 1012141), (39, 544999), (53, 401037), (91, 233571), (113, 188097), (159, 133679), (169, 125769), (273, 77857), (339, 62699), (371, 57291), (507, 41923), (689, 30849), (791, 26871), (1113, 19097), (1183, 17967), (1469, 14469), (2067, 10283), (2373, 8957), (3549, 5989), (4407, 4823)]