12398731880

素因数分解:

$2^3\times 5^1\times {\mathrm{997}}^1\times {\mathrm{310901}}^1$

素因数の和:311909

約数の個数: 32

約数和(自身を含む): 27925217640

約数和(自身を除く): 15526485760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 997, 1994, 3988, 4985, 7976, 9970, 19940, 39880, 310901, 621802, 1243604, 1554505, 2487208, 3109010, 6218020, 12436040, 309968297, 619936594, 1239873188, 1549841485, 2479746376, 3099682970, 6199365940, 12398731880]

約数ペア:

[(1, 12398731880), (2, 6199365940), (4, 3099682970), (5, 2479746376), (8, 1549841485), (10, 1239873188), (20, 619936594), (40, 309968297), (997, 12436040), (1994, 6218020), (3988, 3109010), (4985, 2487208), (7976, 1554505), (9970, 1243604), (19940, 621802), (39880, 310901)]