19990212

素因数分解:

$2^2\times 3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{4093}}^1$

素因数の和:4148

約数の個数: 48

約数和(自身を含む): 52272192

約数和(自身を除く): 32281980

約数列:

[1, 2, 3, 4, 6, 11, 12, 22, 33, 37, 44, 66, 74, 111, 132, 148, 222, 407, 444, 814, 1221, 1628, 2442, 4093, 4884, 8186, 12279, 16372, 24558, 45023, 49116, 90046, 135069, 151441, 180092, 270138, 302882, 454323, 540276, 605764, 908646, 1665851, 1817292, 3331702, 4997553, 6663404, 9995106, 19990212]

約数ペア:

[(1, 19990212), (2, 9995106), (3, 6663404), (4, 4997553), (6, 3331702), (11, 1817292), (12, 1665851), (22, 908646), (33, 605764), (37, 540276), (44, 454323), (66, 302882), (74, 270138), (111, 180092), (132, 151441), (148, 135069), (222, 90046), (407, 49116), (444, 45023), (814, 24558), (1221, 16372), (1628, 12279), (2442, 8186), (4093, 4884)]