664758520

素因数分解:

$2^3\times 5^1\times {\mathrm{829}}^1\times {\mathrm{20047}}^1$

素因数の和:20887

約数の個数: 32

約数和(自身を含む): 1497585600

約数和(自身を除く): 832827080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 829, 1658, 3316, 4145, 6632, 8290, 16580, 20047, 33160, 40094, 80188, 100235, 160376, 200470, 400940, 801880, 16618963, 33237926, 66475852, 83094815, 132951704, 166189630, 332379260, 664758520]

約数ペア:

[(1, 664758520), (2, 332379260), (4, 166189630), (5, 132951704), (8, 83094815), (10, 66475852), (20, 33237926), (40, 16618963), (829, 801880), (1658, 400940), (3316, 200470), (4145, 160376), (6632, 100235), (8290, 80188), (16580, 40094), (20047, 33160)]