21004460

素因数分解:

$2^2\times 5^1\times {\mathrm{947}}^1\times {\mathrm{1109}}^1$

素因数の和:2065

約数の個数: 24

約数和(自身を含む): 44195760

約数和(自身を除く): 23191300

約数列:

[1, 2, 4, 5, 10, 20, 947, 1109, 1894, 2218, 3788, 4436, 4735, 5545, 9470, 11090, 18940, 22180, 1050223, 2100446, 4200892, 5251115, 10502230, 21004460]

約数ペア:

[(1, 21004460), (2, 10502230), (4, 5251115), (5, 4200892), (10, 2100446), (20, 1050223), (947, 22180), (1109, 18940), (1894, 11090), (2218, 9470), (3788, 5545), (4436, 4735)]