217406721

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{544879}}^1$

素因数の和:544908

約数の個数: 16

約数和(自身を含む): 348723200

約数和(自身を除く): 131316479

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 544879, 1634637, 3814153, 10352701, 11442459, 31058103, 72468907, 217406721]

約数ペア:

[(1, 217406721), (3, 72468907), (7, 31058103), (19, 11442459), (21, 10352701), (57, 3814153), (133, 1634637), (399, 544879)]