21491804

素因数分解:

$2^2\times {\mathrm{31}}^2\times {\mathrm{5591}}^1$

素因数の和:5657

約数の個数: 18

約数和(自身を含む): 38869992

約数和(自身を除く): 17378188

約数列:

[1, 2, 4, 31, 62, 124, 961, 1922, 3844, 5591, 11182, 22364, 173321, 346642, 693284, 5372951, 10745902, 21491804]

約数ペア:

[(1, 21491804), (2, 10745902), (4, 5372951), (31, 693284), (62, 346642), (124, 173321), (961, 22364), (1922, 11182), (3844, 5591)]