80216720

素因数分解:

$2^4\times 5^1\times {\mathrm{1002709}}^1$

素因数の和:1002722

約数の個数: 20

約数和(自身を含む): 186504060

約数和(自身を除く): 106287340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1002709, 2005418, 4010836, 5013545, 8021672, 10027090, 16043344, 20054180, 40108360, 80216720]

約数ペア:

[(1, 80216720), (2, 40108360), (4, 20054180), (5, 16043344), (8, 10027090), (10, 8021672), (16, 5013545), (20, 4010836), (40, 2005418), (80, 1002709)]