19906640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19141}}^1$

素因数の和:19167

約数の個数: 40

約数和(自身を含む): 49845768

約数和(自身を除く): 29939128

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19141, 38282, 76564, 95705, 153128, 191410, 248833, 306256, 382820, 497666, 765640, 995332, 1244165, 1531280, 1990664, 2488330, 3981328, 4976660, 9953320, 19906640]

約数ペア:

[(1, 19906640), (2, 9953320), (4, 4976660), (5, 3981328), (8, 2488330), (10, 1990664), (13, 1531280), (16, 1244165), (20, 995332), (26, 765640), (40, 497666), (52, 382820), (65, 306256), (80, 248833), (104, 191410), (130, 153128), (208, 95705), (260, 76564), (520, 38282), (1040, 19141)]