142839280

素因数分解:

$2^4\times 5^1\times {\mathrm{1785491}}^1$

素因数の和:1785504

約数の個数: 20

約数和(自身を含む): 332101512

約数和(自身を除く): 189262232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1785491, 3570982, 7141964, 8927455, 14283928, 17854910, 28567856, 35709820, 71419640, 142839280]

約数ペア:

[(1, 142839280), (2, 71419640), (4, 35709820), (5, 28567856), (8, 17854910), (10, 14283928), (16, 8927455), (20, 7141964), (40, 3570982), (80, 1785491)]