21941361

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{311}}^1$

素因数の和:403

約数の個数: 40

約数和(自身を含む): 35939904

約数和(自身を除く): 13998543

約数列:

[1, 3, 9, 13, 27, 39, 67, 81, 117, 201, 311, 351, 603, 871, 933, 1053, 1809, 2613, 2799, 4043, 5427, 7839, 8397, 12129, 20837, 23517, 25191, 36387, 62511, 70551, 109161, 187533, 270881, 327483, 562599, 812643, 1687797, 2437929, 7313787, 21941361]

約数ペア:

[(1, 21941361), (3, 7313787), (9, 2437929), (13, 1687797), (27, 812643), (39, 562599), (67, 327483), (81, 270881), (117, 187533), (201, 109161), (311, 70551), (351, 62511), (603, 36387), (871, 25191), (933, 23517), (1053, 20837), (1809, 12129), (2613, 8397), (2799, 7839), (4043, 5427)]