21809440

素因数分解:

$2^5\times 5^1\times {\mathrm{136309}}^1$

素因数の和:136324

約数の個数: 24

約数和(自身を含む): 51525180

約数和(自身を除く): 29715740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 136309, 272618, 545236, 681545, 1090472, 1363090, 2180944, 2726180, 4361888, 5452360, 10904720, 21809440]

約数ペア:

[(1, 21809440), (2, 10904720), (4, 5452360), (5, 4361888), (8, 2726180), (10, 2180944), (16, 1363090), (20, 1090472), (32, 681545), (40, 545236), (80, 272618), (160, 136309)]