81888640

素因数分解:

$2^7\times 5^1\times {\mathrm{127951}}^1$

素因数の和:127970

約数の個数: 32

約数和(自身を含む): 195766560

約数和(自身を除く): 113877920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127951, 255902, 511804, 639755, 1023608, 1279510, 2047216, 2559020, 4094432, 5118040, 8188864, 10236080, 16377728, 20472160, 40944320, 81888640]

約数ペア:

[(1, 81888640), (2, 40944320), (4, 20472160), (5, 16377728), (8, 10236080), (10, 8188864), (16, 5118040), (20, 4094432), (32, 2559020), (40, 2047216), (64, 1279510), (80, 1023608), (128, 639755), (160, 511804), (320, 255902), (640, 127951)]