21778768

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{251}}^1$

素因数の和:316

約数の個数: 80

約数和(自身を含む): 50621760

約数和(自身を除く): 28842992

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 29, 34, 44, 58, 68, 88, 116, 136, 176, 187, 232, 251, 272, 319, 374, 464, 493, 502, 638, 748, 986, 1004, 1276, 1496, 1972, 2008, 2552, 2761, 2992, 3944, 4016, 4267, 5104, 5423, 5522, 7279, 7888, 8534, 10846, 11044, 14558, 17068, 21692, 22088, 29116, 34136, 43384, 44176, 46937, 58232, 68272, 80069, 86768, 93874, 116464, 123743, 160138, 187748, 247486, 320276, 375496, 494972, 640552, 750992, 989944, 1281104, 1361173, 1979888, 2722346, 5444692, 10889384, 21778768]

約数ペア:

[(1, 21778768), (2, 10889384), (4, 5444692), (8, 2722346), (11, 1979888), (16, 1361173), (17, 1281104), (22, 989944), (29, 750992), (34, 640552), (44, 494972), (58, 375496), (68, 320276), (88, 247486), (116, 187748), (136, 160138), (176, 123743), (187, 116464), (232, 93874), (251, 86768), (272, 80069), (319, 68272), (374, 58232), (464, 46937), (493, 44176), (502, 43384), (638, 34136), (748, 29116), (986, 22088), (1004, 21692), (1276, 17068), (1496, 14558), (1972, 11044), (2008, 10846), (2552, 8534), (2761, 7888), (2992, 7279), (3944, 5522), (4016, 5423), (4267, 5104)]