20126860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{389}}^1$

素因数の和:610

約数の個数: 48

約数和(自身を含む): 45864000

約数和(自身を除く): 25737140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 199, 260, 389, 398, 778, 796, 995, 1556, 1945, 1990, 2587, 3890, 3980, 5057, 5174, 7780, 10114, 10348, 12935, 20228, 25285, 25870, 50570, 51740, 77411, 101140, 154822, 309644, 387055, 774110, 1006343, 1548220, 2012686, 4025372, 5031715, 10063430, 20126860]

約数ペア:

[(1, 20126860), (2, 10063430), (4, 5031715), (5, 4025372), (10, 2012686), (13, 1548220), (20, 1006343), (26, 774110), (52, 387055), (65, 309644), (130, 154822), (199, 101140), (260, 77411), (389, 51740), (398, 50570), (778, 25870), (796, 25285), (995, 20228), (1556, 12935), (1945, 10348), (1990, 10114), (2587, 7780), (3890, 5174), (3980, 5057)]