64873040

素因数分解:

$2^4\times 5^1\times {\mathrm{810913}}^1$

素因数の和:810926

約数の個数: 20

約数和(自身を含む): 150830004

約数和(自身を除く): 85956964

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810913, 1621826, 3243652, 4054565, 6487304, 8109130, 12974608, 16218260, 32436520, 64873040]

約数ペア:

[(1, 64873040), (2, 32436520), (4, 16218260), (5, 12974608), (8, 8109130), (10, 6487304), (16, 4054565), (20, 3243652), (40, 1621826), (80, 810913)]