21611216

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1$

素因数の和:300

約数の個数: 80

約数和(自身を含む): 50139648

約数和(自身を除く): 28528432

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 31, 34, 44, 62, 68, 88, 124, 136, 176, 187, 233, 248, 272, 341, 374, 466, 496, 527, 682, 748, 932, 1054, 1364, 1496, 1864, 2108, 2563, 2728, 2992, 3728, 3961, 4216, 5126, 5456, 5797, 7223, 7922, 8432, 10252, 11594, 14446, 15844, 20504, 23188, 28892, 31688, 41008, 43571, 46376, 57784, 63376, 79453, 87142, 92752, 115568, 122791, 158906, 174284, 245582, 317812, 348568, 491164, 635624, 697136, 982328, 1271248, 1350701, 1964656, 2701402, 5402804, 10805608, 21611216]

約数ペア:

[(1, 21611216), (2, 10805608), (4, 5402804), (8, 2701402), (11, 1964656), (16, 1350701), (17, 1271248), (22, 982328), (31, 697136), (34, 635624), (44, 491164), (62, 348568), (68, 317812), (88, 245582), (124, 174284), (136, 158906), (176, 122791), (187, 115568), (233, 92752), (248, 87142), (272, 79453), (341, 63376), (374, 57784), (466, 46376), (496, 43571), (527, 41008), (682, 31688), (748, 28892), (932, 23188), (1054, 20504), (1364, 15844), (1496, 14446), (1864, 11594), (2108, 10252), (2563, 8432), (2728, 7922), (2992, 7223), (3728, 5797), (3961, 5456), (4216, 5126)]