21373911

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 35223552

約数和(自身を除く): 13849641

約数列:

[1, 3, 9, 13, 31, 39, 71, 83, 93, 117, 213, 249, 279, 403, 639, 747, 923, 1079, 1209, 2201, 2573, 2769, 3237, 3627, 5893, 6603, 7719, 8307, 9711, 17679, 19809, 23157, 28613, 33449, 53037, 76609, 85839, 100347, 182683, 229827, 257517, 301041, 548049, 689481, 1644147, 2374879, 7124637, 21373911]

約数ペア:

[(1, 21373911), (3, 7124637), (9, 2374879), (13, 1644147), (31, 689481), (39, 548049), (71, 301041), (83, 257517), (93, 229827), (117, 182683), (213, 100347), (249, 85839), (279, 76609), (403, 53037), (639, 33449), (747, 28613), (923, 23157), (1079, 19809), (1209, 17679), (2201, 9711), (2573, 8307), (2769, 7719), (3237, 6603), (3627, 5893)]