217281

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:140

約数の個数: 16

約数和(自身を含む): 313344

約数和(自身を除く): 96063

約数列:

[1, 3, 23, 47, 67, 69, 141, 201, 1081, 1541, 3149, 3243, 4623, 9447, 72427, 217281]

約数ペア:

[(1, 217281), (3, 72427), (23, 9447), (47, 4623), (67, 3243), (69, 3149), (141, 1541), (201, 1081)]