21452420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97511}}^1$

素因数の和:97531

約数の個数: 24

約数和(自身を含む): 49146048

約数和(自身を除く): 27693628

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 97511, 195022, 390044, 487555, 975110, 1072621, 1950220, 2145242, 4290484, 5363105, 10726210, 21452420]

約数ペア:

[(1, 21452420), (2, 10726210), (4, 5363105), (5, 4290484), (10, 2145242), (11, 1950220), (20, 1072621), (22, 975110), (44, 487555), (55, 390044), (110, 195022), (220, 97511)]