217909505

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{360181}}^1$

素因数の和:360208

約数の個数: 12

約数和(自身を含む): 287425236

約数和(自身を除く): 69515731

約数列:

[1, 5, 11, 55, 121, 605, 360181, 1800905, 3961991, 19809955, 43581901, 217909505]

約数ペア:

[(1, 217909505), (5, 43581901), (11, 19809955), (55, 3961991), (121, 1800905), (605, 360181)]