21456578

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:267

約数の個数: 48

約数和(自身を含む): 39528000

約数和(自身を除く): 18071422

約数列:

[1, 2, 11, 13, 22, 26, 29, 58, 143, 169, 199, 286, 319, 338, 377, 398, 638, 754, 1859, 2189, 2587, 3718, 4147, 4378, 4901, 5174, 5771, 8294, 9802, 11542, 28457, 33631, 53911, 56914, 63481, 67262, 75023, 107822, 126962, 150046, 369941, 739882, 825253, 975299, 1650506, 1950598, 10728289, 21456578]

約数ペア:

[(1, 21456578), (2, 10728289), (11, 1950598), (13, 1650506), (22, 975299), (26, 825253), (29, 739882), (58, 369941), (143, 150046), (169, 126962), (199, 107822), (286, 75023), (319, 67262), (338, 63481), (377, 56914), (398, 53911), (638, 33631), (754, 28457), (1859, 11542), (2189, 9802), (2587, 8294), (3718, 5771), (4147, 5174), (4378, 4901)]