21377884

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{1249}}^1$

素因数の和:1653

約数の個数: 24

約数和(自身を含む): 40950000

約数和(自身を除く): 19572116

約数列:

[1, 2, 4, 11, 22, 44, 389, 778, 1249, 1556, 2498, 4279, 4996, 8558, 13739, 17116, 27478, 54956, 485861, 971722, 1943444, 5344471, 10688942, 21377884]

約数ペア:

[(1, 21377884), (2, 10688942), (4, 5344471), (11, 1943444), (22, 971722), (44, 485861), (389, 54956), (778, 27478), (1249, 17116), (1556, 13739), (2498, 8558), (4279, 4996)]