21909880

素因数分解:

$2^3\times 5^1\times {\mathrm{547747}}^1$

素因数の和:547758

約数の個数: 16

約数和(自身を含む): 49297320

約数和(自身を除く): 27387440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547747, 1095494, 2190988, 2738735, 4381976, 5477470, 10954940, 21909880]

約数ペア:

[(1, 21909880), (2, 10954940), (4, 5477470), (5, 4381976), (8, 2738735), (10, 2190988), (20, 1095494), (40, 547747)]