81911620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{521}}^1\times {\mathrm{1123}}^1$

素因数の和:1660

約数の個数: 48

約数和(自身を含む): 197140608

約数和(自身を除く): 115228988

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 521, 1042, 1123, 2084, 2246, 2605, 3647, 4492, 5210, 5615, 7294, 7861, 10420, 11230, 14588, 15722, 18235, 22460, 31444, 36470, 39305, 72940, 78610, 157220, 585083, 1170166, 2340332, 2925415, 4095581, 5850830, 8191162, 11701660, 16382324, 20477905, 40955810, 81911620]

約数ペア:

[(1, 81911620), (2, 40955810), (4, 20477905), (5, 16382324), (7, 11701660), (10, 8191162), (14, 5850830), (20, 4095581), (28, 2925415), (35, 2340332), (70, 1170166), (140, 585083), (521, 157220), (1042, 78610), (1123, 72940), (2084, 39305), (2246, 36470), (2605, 31444), (3647, 22460), (4492, 18235), (5210, 15722), (5615, 14588), (7294, 11230), (7861, 10420)]