81224720

素因数分解:

$2^4\times 5^1\times {\mathrm{1015309}}^1$

素因数の和:1015322

約数の個数: 20

約数和(自身を含む): 188847660

約数和(自身を除く): 107622940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1015309, 2030618, 4061236, 5076545, 8122472, 10153090, 16244944, 20306180, 40612360, 81224720]

約数ペア:

[(1, 81224720), (2, 40612360), (4, 20306180), (5, 16244944), (8, 10153090), (10, 8122472), (16, 5076545), (20, 4061236), (40, 2030618), (80, 1015309)]