21866090

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{15731}}^1$

素因数の和:15877

約数の個数: 16

約数和(自身を含む): 39644640

約数和(自身を除く): 17778550

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 15731, 31462, 78655, 157310, 2186609, 4373218, 10933045, 21866090]

約数ペア:

[(1, 21866090), (2, 10933045), (5, 4373218), (10, 2186609), (139, 157310), (278, 78655), (695, 31462), (1390, 15731)]