678740049

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{81707}}^1$

素因数の和:81797

約数の個数: 24

約数和(自身を含む): 1070701632

約数和(自身を除く): 391961583

約数列:

[1, 3, 9, 13, 39, 71, 117, 213, 639, 923, 2769, 8307, 81707, 245121, 735363, 1062191, 3186573, 5801197, 9559719, 17403591, 52210773, 75415561, 226246683, 678740049]

約数ペア:

[(1, 678740049), (3, 226246683), (9, 75415561), (13, 52210773), (39, 17403591), (71, 9559719), (117, 5801197), (213, 3186573), (639, 1062191), (923, 735363), (2769, 245121), (8307, 81707)]