78931820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{499}}^1\times {\mathrm{719}}^1$

素因数の和:1238

約数の個数: 48

約数和(自身を含む): 181440000

約数和(自身を除く): 102508180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 499, 719, 998, 1438, 1996, 2495, 2876, 3595, 4990, 5489, 7190, 7909, 9980, 10978, 14380, 15818, 21956, 27445, 31636, 39545, 54890, 79090, 109780, 158180, 358781, 717562, 1435124, 1793905, 3587810, 3946591, 7175620, 7893182, 15786364, 19732955, 39465910, 78931820]

約数ペア:

[(1, 78931820), (2, 39465910), (4, 19732955), (5, 15786364), (10, 7893182), (11, 7175620), (20, 3946591), (22, 3587810), (44, 1793905), (55, 1435124), (110, 717562), (220, 358781), (499, 158180), (719, 109780), (998, 79090), (1438, 54890), (1996, 39545), (2495, 31636), (2876, 27445), (3595, 21956), (4990, 15818), (5489, 14380), (7190, 10978), (7909, 9980)]