20828080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2861}}^1$

素因数の和:2894

約数の個数: 80

約数和(自身を含む): 59621184

約数和(自身を除く): 38793104

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2861, 3640, 5722, 7280, 11444, 14305, 20027, 22888, 28610, 37193, 40054, 45776, 57220, 74386, 80108, 100135, 114440, 148772, 160216, 185965, 200270, 228880, 260351, 297544, 320432, 371930, 400540, 520702, 595088, 743860, 801080, 1041404, 1301755, 1487720, 1602160, 2082808, 2603510, 2975440, 4165616, 5207020, 10414040, 20828080]

約数ペア:

[(1, 20828080), (2, 10414040), (4, 5207020), (5, 4165616), (7, 2975440), (8, 2603510), (10, 2082808), (13, 1602160), (14, 1487720), (16, 1301755), (20, 1041404), (26, 801080), (28, 743860), (35, 595088), (40, 520702), (52, 400540), (56, 371930), (65, 320432), (70, 297544), (80, 260351), (91, 228880), (104, 200270), (112, 185965), (130, 160216), (140, 148772), (182, 114440), (208, 100135), (260, 80108), (280, 74386), (364, 57220), (455, 45776), (520, 40054), (560, 37193), (728, 28610), (910, 22888), (1040, 20027), (1456, 14305), (1820, 11444), (2861, 7280), (3640, 5722)]