2159521

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1249}}^1$

素因数の和:1288

約数の個数: 16

約数和(自身を含む): 2800000

約数和(自身を除く): 640479

約数列:

[1, 7, 13, 19, 91, 133, 247, 1249, 1729, 8743, 16237, 23731, 113659, 166117, 308503, 2159521]

約数ペア:

[(1, 2159521), (7, 308503), (13, 166117), (19, 113659), (91, 23731), (133, 16237), (247, 8743), (1249, 1729)]