20125720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11701}}^1$

素因数の和:11755

約数の個数: 32

約数和(自身を含む): 46339920

約数和(自身を除く): 26214200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11701, 23402, 46804, 58505, 93608, 117010, 234020, 468040, 503143, 1006286, 2012572, 2515715, 4025144, 5031430, 10062860, 20125720]

約数ペア:

[(1, 20125720), (2, 10062860), (4, 5031430), (5, 4025144), (8, 2515715), (10, 2012572), (20, 1006286), (40, 503143), (43, 468040), (86, 234020), (172, 117010), (215, 93608), (344, 58505), (430, 46804), (860, 23402), (1720, 11701)]