28456820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{1123}}^1$

素因数の和:1320

約数の個数: 48

約数和(自身を含む): 68734848

約数和(自身を除く): 40278028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 181, 362, 724, 905, 1123, 1267, 1810, 2246, 2534, 3620, 4492, 5068, 5615, 6335, 7861, 11230, 12670, 15722, 22460, 25340, 31444, 39305, 78610, 157220, 203263, 406526, 813052, 1016315, 1422841, 2032630, 2845682, 4065260, 5691364, 7114205, 14228410, 28456820]

約数ペア:

[(1, 28456820), (2, 14228410), (4, 7114205), (5, 5691364), (7, 4065260), (10, 2845682), (14, 2032630), (20, 1422841), (28, 1016315), (35, 813052), (70, 406526), (140, 203263), (181, 157220), (362, 78610), (724, 39305), (905, 31444), (1123, 25340), (1267, 22460), (1810, 15722), (2246, 12670), (2534, 11230), (3620, 7861), (4492, 6335), (5068, 5615)]