12779780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 30744000

約数和(自身を除く): 17964220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 169, 190, 199, 247, 260, 338, 380, 398, 494, 676, 796, 845, 988, 995, 1235, 1690, 1990, 2470, 2587, 3211, 3380, 3781, 3980, 4940, 5174, 6422, 7562, 10348, 12844, 12935, 15124, 16055, 18905, 25870, 32110, 33631, 37810, 49153, 51740, 64220, 67262, 75620, 98306, 134524, 168155, 196612, 245765, 336310, 491530, 638989, 672620, 983060, 1277978, 2555956, 3194945, 6389890, 12779780]

約数ペア:

[(1, 12779780), (2, 6389890), (4, 3194945), (5, 2555956), (10, 1277978), (13, 983060), (19, 672620), (20, 638989), (26, 491530), (38, 336310), (52, 245765), (65, 196612), (76, 168155), (95, 134524), (130, 98306), (169, 75620), (190, 67262), (199, 64220), (247, 51740), (260, 49153), (338, 37810), (380, 33631), (398, 32110), (494, 25870), (676, 18905), (796, 16055), (845, 15124), (988, 12935), (995, 12844), (1235, 10348), (1690, 7562), (1990, 6422), (2470, 5174), (2587, 4940), (3211, 3980), (3380, 3781)]