640054880

素因数分解:

$2^5\times 5^1\times {\mathrm{4000343}}^1$

素因数の和:4000358

約数の個数: 24

約数和(自身を含む): 1512130032

約数和(自身を除く): 872075152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 4000343, 8000686, 16001372, 20001715, 32002744, 40003430, 64005488, 80006860, 128010976, 160013720, 320027440, 640054880]

約数ペア:

[(1, 640054880), (2, 320027440), (4, 160013720), (5, 128010976), (8, 80006860), (10, 64005488), (16, 40003430), (20, 32002744), (32, 20001715), (40, 16001372), (80, 8000686), (160, 4000343)]