21072121616

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1783}}^1\times {\mathrm{8117}}^1$

素因数の和:9928

約数の個数: 80

約数和(自身を含む): 50283281664

約数和(自身を除く): 29211160048

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 364, 728, 1456, 1783, 3566, 7132, 8117, 12481, 14264, 16234, 23179, 24962, 28528, 32468, 46358, 49924, 56819, 64936, 92716, 99848, 105521, 113638, 129872, 162253, 185432, 199696, 211042, 227276, 324506, 370864, 422084, 454552, 649012, 738647, 844168, 909104, 1298024, 1477294, 1688336, 2596048, 2954588, 5909176, 11818352, 14472611, 28945222, 57890444, 101308277, 115780888, 188143943, 202616554, 231561776, 376287886, 405233108, 752575772, 810466216, 1317007601, 1505151544, 1620932432, 2634015202, 3010303088, 5268030404, 10536060808, 21072121616]

約数ペア:

[(1, 21072121616), (2, 10536060808), (4, 5268030404), (7, 3010303088), (8, 2634015202), (13, 1620932432), (14, 1505151544), (16, 1317007601), (26, 810466216), (28, 752575772), (52, 405233108), (56, 376287886), (91, 231561776), (104, 202616554), (112, 188143943), (182, 115780888), (208, 101308277), (364, 57890444), (728, 28945222), (1456, 14472611), (1783, 11818352), (3566, 5909176), (7132, 2954588), (8117, 2596048), (12481, 1688336), (14264, 1477294), (16234, 1298024), (23179, 909104), (24962, 844168), (28528, 738647), (32468, 649012), (46358, 454552), (49924, 422084), (56819, 370864), (64936, 324506), (92716, 227276), (99848, 211042), (105521, 199696), (113638, 185432), (129872, 162253)]