20911088

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{241}}^1$

素因数の和:306

約数の個数: 80

約数和(自身を含む): 48612960

約数和(自身を除く): 27701872

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 29, 34, 44, 58, 68, 88, 116, 136, 176, 187, 232, 241, 272, 319, 374, 464, 482, 493, 638, 748, 964, 986, 1276, 1496, 1928, 1972, 2552, 2651, 2992, 3856, 3944, 4097, 5104, 5302, 5423, 6989, 7888, 8194, 10604, 10846, 13978, 16388, 21208, 21692, 27956, 32776, 42416, 43384, 45067, 55912, 65552, 76879, 86768, 90134, 111824, 118813, 153758, 180268, 237626, 307516, 360536, 475252, 615032, 721072, 950504, 1230064, 1306943, 1901008, 2613886, 5227772, 10455544, 20911088]

約数ペア:

[(1, 20911088), (2, 10455544), (4, 5227772), (8, 2613886), (11, 1901008), (16, 1306943), (17, 1230064), (22, 950504), (29, 721072), (34, 615032), (44, 475252), (58, 360536), (68, 307516), (88, 237626), (116, 180268), (136, 153758), (176, 118813), (187, 111824), (232, 90134), (241, 86768), (272, 76879), (319, 65552), (374, 55912), (464, 45067), (482, 43384), (493, 42416), (638, 32776), (748, 27956), (964, 21692), (986, 21208), (1276, 16388), (1496, 13978), (1928, 10846), (1972, 10604), (2552, 8194), (2651, 7888), (2992, 6989), (3856, 5423), (3944, 5302), (4097, 5104)]