21180560

素因数分解:

$2^4\times 5^1\times {\mathrm{264757}}^1$

素因数の和:264770

約数の個数: 20

約数和(自身を含む): 49244988

約数和(自身を除く): 28064428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264757, 529514, 1059028, 1323785, 2118056, 2647570, 4236112, 5295140, 10590280, 21180560]

約数ペア:

[(1, 21180560), (2, 10590280), (4, 5295140), (5, 4236112), (8, 2647570), (10, 2118056), (16, 1323785), (20, 1059028), (40, 529514), (80, 264757)]