78505840

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{2861}}^1$

素因数の和:2895

約数の個数: 80

約数和(自身を含む): 212932800

約数和(自身を除く): 134426960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 490, 560, 686, 784, 980, 1372, 1715, 1960, 2744, 2861, 3430, 3920, 5488, 5722, 6860, 11444, 13720, 14305, 20027, 22888, 27440, 28610, 40054, 45776, 57220, 80108, 100135, 114440, 140189, 160216, 200270, 228880, 280378, 320432, 400540, 560756, 700945, 801080, 981323, 1121512, 1401890, 1602160, 1962646, 2243024, 2803780, 3925292, 4906615, 5607560, 7850584, 9813230, 11215120, 15701168, 19626460, 39252920, 78505840]

約数ペア:

[(1, 78505840), (2, 39252920), (4, 19626460), (5, 15701168), (7, 11215120), (8, 9813230), (10, 7850584), (14, 5607560), (16, 4906615), (20, 3925292), (28, 2803780), (35, 2243024), (40, 1962646), (49, 1602160), (56, 1401890), (70, 1121512), (80, 981323), (98, 801080), (112, 700945), (140, 560756), (196, 400540), (245, 320432), (280, 280378), (343, 228880), (392, 200270), (490, 160216), (560, 140189), (686, 114440), (784, 100135), (980, 80108), (1372, 57220), (1715, 45776), (1960, 40054), (2744, 28610), (2861, 27440), (3430, 22888), (3920, 20027), (5488, 14305), (5722, 13720), (6860, 11444)]