81280

素因数分解:

$2^7\times 5^1\times {\mathrm{127}}^1$

素因数の和:146

約数の個数: 32

約数和(自身を含む): 195840

約数和(自身を除く): 114560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 320, 508, 635, 640, 1016, 1270, 2032, 2540, 4064, 5080, 8128, 10160, 16256, 20320, 40640, 81280]

約数ペア:

[(1, 81280), (2, 40640), (4, 20320), (5, 16256), (8, 10160), (10, 8128), (16, 5080), (20, 4064), (32, 2540), (40, 2032), (64, 1270), (80, 1016), (127, 640), (128, 635), (160, 508), (254, 320)]