21059995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{8147}}^1$

素因数の和:8210

約数の個数: 16

約数和(自身を含む): 28159488

約数和(自身を除く): 7099493

約数列:

[1, 5, 11, 47, 55, 235, 517, 2585, 8147, 40735, 89617, 382909, 448085, 1914545, 4211999, 21059995]

約数ペア:

[(1, 21059995), (5, 4211999), (11, 1914545), (47, 448085), (55, 382909), (235, 89617), (517, 40735), (2585, 8147)]