19028191

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{991}}^1$

素因数の和:1222

約数の個数: 16

約数和(自身を含む): 23554048

約数和(自身を除く): 4525857

約数列:

[1, 7, 13, 91, 211, 991, 1477, 2743, 6937, 12883, 19201, 90181, 209101, 1463707, 2718313, 19028191]

約数ペア:

[(1, 19028191), (7, 2718313), (13, 1463707), (91, 209101), (211, 90181), (991, 19201), (1477, 12883), (2743, 6937)]