21817520

素因数分解:

$2^4\times 5^1\times {\mathrm{272719}}^1$

素因数の和:272732

約数の個数: 20

約数和(自身を含む): 50725920

約数和(自身を除く): 28908400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272719, 545438, 1090876, 1363595, 2181752, 2727190, 4363504, 5454380, 10908760, 21817520]

約数ペア:

[(1, 21817520), (2, 10908760), (4, 5454380), (5, 4363504), (8, 2727190), (10, 2181752), (16, 1363595), (20, 1090876), (40, 545438), (80, 272719)]