64217680

素因数分解:

$2^4\times 5^1\times {\mathrm{802721}}^1$

素因数の和:802734

約数の個数: 20

約数和(自身を含む): 149306292

約数和(自身を除く): 85088612

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 802721, 1605442, 3210884, 4013605, 6421768, 8027210, 12843536, 16054420, 32108840, 64217680]

約数ペア:

[(1, 64217680), (2, 32108840), (4, 16054420), (5, 12843536), (8, 8027210), (10, 6421768), (16, 4013605), (20, 3210884), (40, 1605442), (80, 802721)]