21798200

素因数分解:

$2^3\times 5^2\times {\mathrm{108991}}^1$

素因数の和:109007

約数の個数: 24

約数和(自身を含む): 50681280

約数和(自身を除く): 28883080

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 108991, 217982, 435964, 544955, 871928, 1089910, 2179820, 2724775, 4359640, 5449550, 10899100, 21798200]

約数ペア:

[(1, 21798200), (2, 10899100), (4, 5449550), (5, 4359640), (8, 2724775), (10, 2179820), (20, 1089910), (25, 871928), (40, 544955), (50, 435964), (100, 217982), (200, 108991)]