20045595880

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1\times {\mathrm{971}}^1$

素因数の和:1247

約数の個数: 128

約数和(自身を含む): 47029248000

約数和(自身を除く): 26983652120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 79, 94, 139, 158, 188, 235, 278, 316, 376, 395, 470, 556, 632, 695, 790, 940, 971, 1112, 1390, 1580, 1880, 1942, 2780, 3160, 3713, 3884, 4855, 5560, 6533, 7426, 7768, 9710, 10981, 13066, 14852, 18565, 19420, 21962, 26132, 29704, 32665, 37130, 38840, 43924, 45637, 52264, 54905, 65330, 74260, 76709, 87848, 91274, 109810, 130660, 134969, 148520, 153418, 182548, 219620, 228185, 261320, 269938, 306836, 365096, 383545, 439240, 456370, 516107, 539876, 613672, 674845, 767090, 912740, 1032214, 1079752, 1349690, 1534180, 1825480, 2064428, 2580535, 2699380, 3068360, 3605323, 4128856, 5161070, 5398760, 6343543, 7210646, 10322140, 10662551, 12687086, 14421292, 18026615, 20644280, 21325102, 25374172, 28842584, 31717715, 36053230, 42650204, 50748344, 53312755, 63435430, 72106460, 85300408, 106625510, 126870860, 144212920, 213251020, 253741720, 426502040, 501139897, 1002279794, 2004559588, 2505699485, 4009119176, 5011398970, 10022797940, 20045595880]

約数ペア:

[(1, 20045595880), (2, 10022797940), (4, 5011398970), (5, 4009119176), (8, 2505699485), (10, 2004559588), (20, 1002279794), (40, 501139897), (47, 426502040), (79, 253741720), (94, 213251020), (139, 144212920), (158, 126870860), (188, 106625510), (235, 85300408), (278, 72106460), (316, 63435430), (376, 53312755), (395, 50748344), (470, 42650204), (556, 36053230), (632, 31717715), (695, 28842584), (790, 25374172), (940, 21325102), (971, 20644280), (1112, 18026615), (1390, 14421292), (1580, 12687086), (1880, 10662551), (1942, 10322140), (2780, 7210646), (3160, 6343543), (3713, 5398760), (3884, 5161070), (4855, 4128856), (5560, 3605323), (6533, 3068360), (7426, 2699380), (7768, 2580535), (9710, 2064428), (10981, 1825480), (13066, 1534180), (14852, 1349690), (18565, 1079752), (19420, 1032214), (21962, 912740), (26132, 767090), (29704, 674845), (32665, 613672), (37130, 539876), (38840, 516107), (43924, 456370), (45637, 439240), (52264, 383545), (54905, 365096), (65330, 306836), (74260, 269938), (76709, 261320), (87848, 228185), (91274, 219620), (109810, 182548), (130660, 153418), (134969, 148520)]