19418020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10909}}^1$

素因数の和:11007

約数の個数: 24

約数和(自身を含む): 41239800

約数和(自身を除く): 21821780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10909, 21818, 43636, 54545, 109090, 218180, 970901, 1941802, 3883604, 4854505, 9709010, 19418020]

約数ペア:

[(1, 19418020), (2, 9709010), (4, 4854505), (5, 3883604), (10, 1941802), (20, 970901), (89, 218180), (178, 109090), (356, 54545), (445, 43636), (890, 21818), (1780, 10909)]