21219939

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{619}}^1$

素因数の和:931

約数の個数: 24

約数和(自身を含む): 33174960

約数和(自身を除く): 11955021

約数列:

[1, 3, 9, 13, 39, 117, 293, 619, 879, 1857, 2637, 3809, 5571, 8047, 11427, 24141, 34281, 72423, 181367, 544101, 1632303, 2357771, 7073313, 21219939]

約数ペア:

[(1, 21219939), (3, 7073313), (9, 2357771), (13, 1632303), (39, 544101), (117, 181367), (293, 72423), (619, 34281), (879, 24141), (1857, 11427), (2637, 8047), (3809, 5571)]