18864640

素因数分解:

$2^9\times 5^1\times {\mathrm{7369}}^1$

素因数の和:7392

約数の個数: 40

約数和(自身を含む): 45237060

約数和(自身を除く): 26372420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 7369, 14738, 29476, 36845, 58952, 73690, 117904, 147380, 235808, 294760, 471616, 589520, 943232, 1179040, 1886464, 2358080, 3772928, 4716160, 9432320, 18864640]

約数ペア:

[(1, 18864640), (2, 9432320), (4, 4716160), (5, 3772928), (8, 2358080), (10, 1886464), (16, 1179040), (20, 943232), (32, 589520), (40, 471616), (64, 294760), (80, 235808), (128, 147380), (160, 117904), (256, 73690), (320, 58952), (512, 36845), (640, 29476), (1280, 14738), (2560, 7369)]