2641280

素因数分解:

$2^7\times 5^1\times {\mathrm{4127}}^1$

素因数の和:4146

約数の個数: 32

約数和(自身を含む): 6315840

約数和(自身を除く): 3674560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 4127, 8254, 16508, 20635, 33016, 41270, 66032, 82540, 132064, 165080, 264128, 330160, 528256, 660320, 1320640, 2641280]

約数ペア:

[(1, 2641280), (2, 1320640), (4, 660320), (5, 528256), (8, 330160), (10, 264128), (16, 165080), (20, 132064), (32, 82540), (40, 66032), (64, 41270), (80, 33016), (128, 20635), (160, 16508), (320, 8254), (640, 4127)]