21044257

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{661}}^1$

素因数の和:784

約数の個数: 16

約数和(自身を含む): 23726080

約数和(自身を除く): 2681823

約数列:

[1, 13, 31, 79, 403, 661, 1027, 2449, 8593, 20491, 31837, 52219, 266383, 678847, 1618789, 21044257]

約数ペア:

[(1, 21044257), (13, 1618789), (31, 678847), (79, 266383), (403, 52219), (661, 31837), (1027, 20491), (2449, 8593)]