21081006

素因数分解:

$2^1\times 3^3\times {\mathrm{390389}}^1$

素因数の和:390400

約数の個数: 16

約数和(自身を含む): 46846800

約数和(自身を除く): 25765794

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 390389, 780778, 1171167, 2342334, 3513501, 7027002, 10540503, 21081006]

約数ペア:

[(1, 21081006), (2, 10540503), (3, 7027002), (6, 3513501), (9, 2342334), (18, 1171167), (27, 780778), (54, 390389)]