64640

素因数分解:

$2^7\times 5^1\times {\mathrm{101}}^1$

素因数の和:120

約数の個数: 32

約数和(自身を含む): 156060

約数和(自身を除く): 91420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 128, 160, 202, 320, 404, 505, 640, 808, 1010, 1616, 2020, 3232, 4040, 6464, 8080, 12928, 16160, 32320, 64640]

約数ペア:

[(1, 64640), (2, 32320), (4, 16160), (5, 12928), (8, 8080), (10, 6464), (16, 4040), (20, 3232), (32, 2020), (40, 1616), (64, 1010), (80, 808), (101, 640), (128, 505), (160, 404), (202, 320)]