28819180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{557}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 65620800

約数和(自身を除く): 36801620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 199, 260, 398, 557, 796, 995, 1114, 1990, 2228, 2587, 2785, 3980, 5174, 5570, 7241, 10348, 11140, 12935, 14482, 25870, 28964, 36205, 51740, 72410, 110843, 144820, 221686, 443372, 554215, 1108430, 1440959, 2216860, 2881918, 5763836, 7204795, 14409590, 28819180]

約数ペア:

[(1, 28819180), (2, 14409590), (4, 7204795), (5, 5763836), (10, 2881918), (13, 2216860), (20, 1440959), (26, 1108430), (52, 554215), (65, 443372), (130, 221686), (199, 144820), (260, 110843), (398, 72410), (557, 51740), (796, 36205), (995, 28964), (1114, 25870), (1990, 14482), (2228, 12935), (2587, 11140), (2785, 10348), (3980, 7241), (5174, 5570)]