20778888520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1259}}^1\times {\mathrm{1867}}^1$

素因数の和:3167

約数の個数: 128

約数和(自身を含む): 53381462400

約数和(自身を除く): 32602573880

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1259, 1768, 1867, 2210, 2518, 3734, 4420, 5036, 6295, 7468, 8840, 9335, 10072, 12590, 14936, 16367, 18670, 21403, 24271, 25180, 31739, 32734, 37340, 42806, 48542, 50360, 63478, 65468, 74680, 81835, 85612, 97084, 107015, 121355, 126956, 130936, 158695, 163670, 171224, 194168, 214030, 242710, 253912, 278239, 317390, 327340, 412607, 428060, 485420, 556478, 634780, 654680, 825214, 856120, 970840, 1112956, 1269560, 1391195, 1650428, 2063035, 2225912, 2350553, 2782390, 3300856, 4126070, 4701106, 5564780, 8252140, 9402212, 11129560, 11752765, 16504280, 18804424, 23505530, 30557189, 39959401, 47011060, 61114378, 79918802, 94022120, 122228756, 152785945, 159837604, 199797005, 244457512, 305571890, 319675208, 399594010, 519472213, 611143780, 799188020, 1038944426, 1222287560, 1598376040, 2077888852, 2597361065, 4155777704, 5194722130, 10389444260, 20778888520]

約数ペア:

[(1, 20778888520), (2, 10389444260), (4, 5194722130), (5, 4155777704), (8, 2597361065), (10, 2077888852), (13, 1598376040), (17, 1222287560), (20, 1038944426), (26, 799188020), (34, 611143780), (40, 519472213), (52, 399594010), (65, 319675208), (68, 305571890), (85, 244457512), (104, 199797005), (130, 159837604), (136, 152785945), (170, 122228756), (221, 94022120), (260, 79918802), (340, 61114378), (442, 47011060), (520, 39959401), (680, 30557189), (884, 23505530), (1105, 18804424), (1259, 16504280), (1768, 11752765), (1867, 11129560), (2210, 9402212), (2518, 8252140), (3734, 5564780), (4420, 4701106), (5036, 4126070), (6295, 3300856), (7468, 2782390), (8840, 2350553), (9335, 2225912), (10072, 2063035), (12590, 1650428), (14936, 1391195), (16367, 1269560), (18670, 1112956), (21403, 970840), (24271, 856120), (25180, 825214), (31739, 654680), (32734, 634780), (37340, 556478), (42806, 485420), (48542, 428060), (50360, 412607), (63478, 327340), (65468, 317390), (74680, 278239), (81835, 253912), (85612, 242710), (97084, 214030), (107015, 194168), (121355, 171224), (126956, 163670), (130936, 158695)]