1388565520

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{193}}^1\times {\mathrm{647}}^1$

素因数の和:992

約数の個数: 80

約数和(自身を含む): 3273540480

約数和(自身を除く): 1884974960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 193, 278, 386, 556, 647, 695, 772, 965, 1112, 1294, 1390, 1544, 1930, 2224, 2588, 2780, 3088, 3235, 3860, 5176, 5560, 6470, 7720, 10352, 11120, 12940, 15440, 25880, 26827, 51760, 53654, 89933, 107308, 124871, 134135, 179866, 214616, 249742, 268270, 359732, 429232, 449665, 499484, 536540, 624355, 719464, 899330, 998968, 1073080, 1248710, 1438928, 1798660, 1997936, 2146160, 2497420, 3597320, 4994840, 7194640, 9989680, 17357069, 34714138, 69428276, 86785345, 138856552, 173570690, 277713104, 347141380, 694282760, 1388565520]

約数ペア:

[(1, 1388565520), (2, 694282760), (4, 347141380), (5, 277713104), (8, 173570690), (10, 138856552), (16, 86785345), (20, 69428276), (40, 34714138), (80, 17357069), (139, 9989680), (193, 7194640), (278, 4994840), (386, 3597320), (556, 2497420), (647, 2146160), (695, 1997936), (772, 1798660), (965, 1438928), (1112, 1248710), (1294, 1073080), (1390, 998968), (1544, 899330), (1930, 719464), (2224, 624355), (2588, 536540), (2780, 499484), (3088, 449665), (3235, 429232), (3860, 359732), (5176, 268270), (5560, 249742), (6470, 214616), (7720, 179866), (10352, 134135), (11120, 124871), (12940, 107308), (15440, 89933), (25880, 53654), (26827, 51760)]