217118

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:223

約数の個数: 16

約数和(自身を含む): 362880

約数和(自身を除く): 145762

約数列:

[1, 2, 11, 22, 71, 139, 142, 278, 781, 1529, 1562, 3058, 9869, 19738, 108559, 217118]

約数ペア:

[(1, 217118), (2, 108559), (11, 19738), (22, 9869), (71, 3058), (139, 1562), (142, 1529), (278, 781)]