20801720

素因数分解:

$2^3\times 5^1\times {\mathrm{520043}}^1$

素因数の和:520054

約数の個数: 16

約数和(自身を含む): 46803960

約数和(自身を除く): 26002240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 520043, 1040086, 2080172, 2600215, 4160344, 5200430, 10400860, 20801720]

約数ペア:

[(1, 20801720), (2, 10400860), (4, 5200430), (5, 4160344), (8, 2600215), (10, 2080172), (20, 1040086), (40, 520043)]