197972901

素因数分解:

$3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{30509}}^1$

素因数の和:30625

約数の個数: 24

約数和(自身を含む): 329996160

約数和(自身を除く): 132023259

約数列:

[1, 3, 7, 9, 21, 63, 103, 309, 721, 927, 2163, 6489, 30509, 91527, 213563, 274581, 640689, 1922067, 3142427, 9427281, 21996989, 28281843, 65990967, 197972901]

約数ペア:

[(1, 197972901), (3, 65990967), (7, 28281843), (9, 21996989), (21, 9427281), (63, 3142427), (103, 1922067), (309, 640689), (721, 274581), (927, 213563), (2163, 91527), (6489, 30509)]