21717560

素因数分解:

$2^3\times 5^1\times {\mathrm{542939}}^1$

素因数の和:542950

約数の個数: 16

約数和(自身を含む): 48864600

約数和(自身を除く): 27147040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542939, 1085878, 2171756, 2714695, 4343512, 5429390, 10858780, 21717560]

約数ペア:

[(1, 21717560), (2, 10858780), (4, 5429390), (5, 4343512), (8, 2714695), (10, 2171756), (20, 1085878), (40, 542939)]