18681621

素因数分解:

$3^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{2549}}^1$

素因数の和:2908

約数の個数: 16

約数和(自身を含む): 28560000

約数和(自身を除く): 9878379

約数列:

[1, 3, 7, 21, 349, 1047, 2443, 2549, 7329, 7647, 17843, 53529, 889601, 2668803, 6227207, 18681621]

約数ペア:

[(1, 18681621), (3, 6227207), (7, 2668803), (21, 889601), (349, 53529), (1047, 17843), (2443, 7647), (2549, 7329)]