19847810

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:386

約数の個数: 32

約数和(自身を含む): 36590400

約数和(自身を除く): 16742590

約数列:

[1, 2, 5, 10, 109, 131, 139, 218, 262, 278, 545, 655, 695, 1090, 1310, 1390, 14279, 15151, 18209, 28558, 30302, 36418, 71395, 75755, 91045, 142790, 151510, 182090, 1984781, 3969562, 9923905, 19847810]

約数ペア:

[(1, 19847810), (2, 9923905), (5, 3969562), (10, 1984781), (109, 182090), (131, 151510), (139, 142790), (218, 91045), (262, 75755), (278, 71395), (545, 36418), (655, 30302), (695, 28558), (1090, 18209), (1310, 15151), (1390, 14279)]