19905340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10937}}^1$

素因数の和:10966

約数の個数: 48

約数和(自身を含む): 51452352

約数和(自身を除く): 31547012

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10937, 21874, 43748, 54685, 76559, 109370, 142181, 153118, 218740, 284362, 306236, 382795, 568724, 710905, 765590, 995267, 1421810, 1531180, 1990534, 2843620, 3981068, 4976335, 9952670, 19905340]

約数ペア:

[(1, 19905340), (2, 9952670), (4, 4976335), (5, 3981068), (7, 2843620), (10, 1990534), (13, 1531180), (14, 1421810), (20, 995267), (26, 765590), (28, 710905), (35, 568724), (52, 382795), (65, 306236), (70, 284362), (91, 218740), (130, 153118), (140, 142181), (182, 109370), (260, 76559), (364, 54685), (455, 43748), (910, 21874), (1820, 10937)]