21007563

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{2381}}^1$

素因数の和:2574

約数の個数: 16

約数和(自身を含む): 29841696

約数和(自身を除く): 8834133

約数列:

[1, 3, 17, 51, 173, 519, 2381, 2941, 7143, 8823, 40477, 121431, 411913, 1235739, 7002521, 21007563]

約数ペア:

[(1, 21007563), (3, 7002521), (17, 1235739), (51, 411913), (173, 121431), (519, 40477), (2381, 8823), (2941, 7143)]