80665520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{77563}}^1$

素因数の和:77589

約数の個数: 40

約数和(自身を含む): 201976656

約数和(自身を除く): 121311136

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 77563, 155126, 310252, 387815, 620504, 775630, 1008319, 1241008, 1551260, 2016638, 3102520, 4033276, 5041595, 6205040, 8066552, 10083190, 16133104, 20166380, 40332760, 80665520]

約数ペア:

[(1, 80665520), (2, 40332760), (4, 20166380), (5, 16133104), (8, 10083190), (10, 8066552), (13, 6205040), (16, 5041595), (20, 4033276), (26, 3102520), (40, 2016638), (52, 1551260), (65, 1241008), (80, 1008319), (104, 775630), (130, 620504), (208, 387815), (260, 310252), (520, 155126), (1040, 77563)]