21866785

素因数分解:

$5^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1\times {\mathrm{431}}^1$

素因数の和:648

約数の個数: 16

約数和(自身を含む): 26853120

約数和(自身を除く): 4986335

約数列:

[1, 5, 73, 139, 365, 431, 695, 2155, 10147, 31463, 50735, 59909, 157315, 299545, 4373357, 21866785]

約数ペア:

[(1, 21866785), (5, 4373357), (73, 299545), (139, 157315), (365, 59909), (431, 50735), (695, 31463), (2155, 10147)]