21158990

素因数分解:

$2^1\times 5^1\times {\mathrm{811}}^1\times {\mathrm{2609}}^1$

素因数の和:3427

約数の個数: 16

約数和(自身を含む): 38147760

約数和(自身を除く): 16988770

約数列:

[1, 2, 5, 10, 811, 1622, 2609, 4055, 5218, 8110, 13045, 26090, 2115899, 4231798, 10579495, 21158990]

約数ペア:

[(1, 21158990), (2, 10579495), (5, 4231798), (10, 2115899), (811, 26090), (1622, 13045), (2609, 8110), (4055, 5218)]