27860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{199}}^1$

素因数の和:215

約数の個数: 24

約数和(自身を含む): 67200

約数和(自身を除く): 39340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 199, 398, 796, 995, 1393, 1990, 2786, 3980, 5572, 6965, 13930, 27860]

約数ペア:

[(1, 27860), (2, 13930), (4, 6965), (5, 5572), (7, 3980), (10, 2786), (14, 1990), (20, 1393), (28, 995), (35, 796), (70, 398), (140, 199)]