20917442

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{263}}^1$

素因数の和:327

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 21660478

約数列:

[1, 2, 7, 13, 14, 19, 23, 26, 38, 46, 91, 133, 161, 182, 247, 263, 266, 299, 322, 437, 494, 526, 598, 874, 1729, 1841, 2093, 3059, 3419, 3458, 3682, 4186, 4997, 5681, 6049, 6118, 6838, 9994, 11362, 12098, 23933, 34979, 39767, 42343, 47866, 64961, 69958, 78637, 79534, 84686, 114931, 129922, 157274, 229862, 454727, 550459, 804517, 909454, 1100918, 1494103, 1609034, 2988206, 10458721, 20917442]

約数ペア:

[(1, 20917442), (2, 10458721), (7, 2988206), (13, 1609034), (14, 1494103), (19, 1100918), (23, 909454), (26, 804517), (38, 550459), (46, 454727), (91, 229862), (133, 157274), (161, 129922), (182, 114931), (247, 84686), (263, 79534), (266, 78637), (299, 69958), (322, 64961), (437, 47866), (494, 42343), (526, 39767), (598, 34979), (874, 23933), (1729, 12098), (1841, 11362), (2093, 9994), (3059, 6838), (3419, 6118), (3458, 6049), (3682, 5681), (4186, 4997)]