21711440

素因数分解:

$2^4\times 5^1\times {\mathrm{271393}}^1$

素因数の和:271406

約数の個数: 20

約数和(自身を含む): 50479284

約数和(自身を除く): 28767844

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271393, 542786, 1085572, 1356965, 2171144, 2713930, 4342288, 5427860, 10855720, 21711440]

約数ペア:

[(1, 21711440), (2, 10855720), (4, 5427860), (5, 4342288), (8, 2713930), (10, 2171144), (16, 1356965), (20, 1085572), (40, 542786), (80, 271393)]