21400743

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{283}}^1$

素因数の和:583

約数の個数: 32

約数和(自身を含む): 35370496

約数和(自身を除く): 13969753

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 277, 283, 831, 849, 1939, 1981, 3601, 3679, 5817, 5943, 10803, 11037, 25207, 25753, 75621, 77259, 78391, 235173, 548737, 1019083, 1646211, 3057249, 7133581, 21400743]

約数ペア:

[(1, 21400743), (3, 7133581), (7, 3057249), (13, 1646211), (21, 1019083), (39, 548737), (91, 235173), (273, 78391), (277, 77259), (283, 75621), (831, 25753), (849, 25207), (1939, 11037), (1981, 10803), (3601, 5943), (3679, 5817)]