19987653

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{30703}}^1$

素因数の和:30744

約数の個数: 16

約数和(自身を含む): 31440896

約数和(自身を除く): 11453243

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 30703, 92109, 214921, 644763, 951793, 2855379, 6662551, 19987653]

約数ペア:

[(1, 19987653), (3, 6662551), (7, 2855379), (21, 951793), (31, 644763), (93, 214921), (217, 92109), (651, 30703)]