20403440

素因数分解:

$2^4\times 5^1\times {\mathrm{255043}}^1$

素因数の和:255056

約数の個数: 20

約数和(自身を含む): 47438184

約数和(自身を除く): 27034744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255043, 510086, 1020172, 1275215, 2040344, 2550430, 4080688, 5100860, 10201720, 20403440]

約数ペア:

[(1, 20403440), (2, 10201720), (4, 5100860), (5, 4080688), (8, 2550430), (10, 2040344), (16, 1275215), (20, 1020172), (40, 510086), (80, 255043)]