19978816

素因数分解:

$2^6\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1$

素因数の和:132

約数の個数: 112

約数和(自身を含む): 48646080

約数和(自身を除く): 28667264

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 32, 37, 44, 52, 59, 64, 74, 88, 104, 118, 143, 148, 176, 208, 236, 286, 296, 352, 407, 416, 472, 481, 572, 592, 649, 704, 767, 814, 832, 944, 962, 1144, 1184, 1298, 1534, 1628, 1888, 1924, 2183, 2288, 2368, 2596, 3068, 3256, 3776, 3848, 4366, 4576, 5192, 5291, 6136, 6512, 7696, 8437, 8732, 9152, 10384, 10582, 12272, 13024, 15392, 16874, 17464, 20768, 21164, 24013, 24544, 26048, 28379, 30784, 33748, 34928, 41536, 42328, 48026, 49088, 56758, 67496, 69856, 84656, 96052, 113516, 134992, 139712, 169312, 192104, 227032, 269984, 312169, 338624, 384208, 454064, 539968, 624338, 768416, 908128, 1248676, 1536832, 1816256, 2497352, 4994704, 9989408, 19978816]

約数ペア:

[(1, 19978816), (2, 9989408), (4, 4994704), (8, 2497352), (11, 1816256), (13, 1536832), (16, 1248676), (22, 908128), (26, 768416), (32, 624338), (37, 539968), (44, 454064), (52, 384208), (59, 338624), (64, 312169), (74, 269984), (88, 227032), (104, 192104), (118, 169312), (143, 139712), (148, 134992), (176, 113516), (208, 96052), (236, 84656), (286, 69856), (296, 67496), (352, 56758), (407, 49088), (416, 48026), (472, 42328), (481, 41536), (572, 34928), (592, 33748), (649, 30784), (704, 28379), (767, 26048), (814, 24544), (832, 24013), (944, 21164), (962, 20768), (1144, 17464), (1184, 16874), (1298, 15392), (1534, 13024), (1628, 12272), (1888, 10582), (1924, 10384), (2183, 9152), (2288, 8732), (2368, 8437), (2596, 7696), (3068, 6512), (3256, 6136), (3776, 5291), (3848, 5192), (4366, 4576)]