19688851

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{409}}^1$

素因数の和:475

約数の個数: 24

約数和(自身を含む): 25393760

約数和(自身を除く): 5704909

約数列:

[1, 7, 13, 23, 91, 161, 299, 409, 529, 2093, 2863, 3703, 5317, 6877, 9407, 37219, 48139, 65849, 122291, 216361, 856037, 1514527, 2812693, 19688851]

約数ペア:

[(1, 19688851), (7, 2812693), (13, 1514527), (23, 856037), (91, 216361), (161, 122291), (299, 65849), (409, 48139), (529, 37219), (2093, 9407), (2863, 6877), (3703, 5317)]