19901645

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{12323}}^1$

素因数の和:12364

約数の個数: 16

約数和(自身を含む): 26619840

約数和(自身を除く): 6718195

約数列:

[1, 5, 17, 19, 85, 95, 323, 1615, 12323, 61615, 209491, 234137, 1047455, 1170685, 3980329, 19901645]

約数ペア:

[(1, 19901645), (5, 3980329), (17, 1170685), (19, 1047455), (85, 234137), (95, 209491), (323, 61615), (1615, 12323)]