16978941

素因数分解:

$3^2\times 7^2\times {\mathrm{38501}}^1$

素因数の和:38521

約数の個数: 18

約数和(自身を含む): 28529982

約数和(自身を除く): 11551041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 38501, 115503, 269507, 346509, 808521, 1886549, 2425563, 5659647, 16978941]

約数ペア:

[(1, 16978941), (3, 5659647), (7, 2425563), (9, 1886549), (21, 808521), (49, 346509), (63, 269507), (147, 115503), (441, 38501)]