128704640

素因数分解:

$2^7\times 5^1\times {\mathrm{201101}}^1$

素因数の和:201120

約数の個数: 32

約数和(自身を含む): 307686060

約数和(自身を除く): 178981420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 201101, 402202, 804404, 1005505, 1608808, 2011010, 3217616, 4022020, 6435232, 8044040, 12870464, 16088080, 25740928, 32176160, 64352320, 128704640]

約数ペア:

[(1, 128704640), (2, 64352320), (4, 32176160), (5, 25740928), (8, 16088080), (10, 12870464), (16, 8044040), (20, 6435232), (32, 4022020), (40, 3217616), (64, 2011010), (80, 1608808), (128, 1005505), (160, 804404), (320, 402202), (640, 201101)]