21556040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48991}}^1$

素因数の和:49013

約数の個数: 32

約数和(自身を含む): 52911360

約数和(自身を除く): 31355320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48991, 97982, 195964, 244955, 391928, 489910, 538901, 979820, 1077802, 1959640, 2155604, 2694505, 4311208, 5389010, 10778020, 21556040]

約数ペア:

[(1, 21556040), (2, 10778020), (4, 5389010), (5, 4311208), (8, 2694505), (10, 2155604), (11, 1959640), (20, 1077802), (22, 979820), (40, 538901), (44, 489910), (55, 391928), (88, 244955), (110, 195964), (220, 97982), (440, 48991)]