17972787

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{23131}}^1$

素因数の和:23178

約数の個数: 16

約数和(自身を含む): 28128512

約数和(自身を除く): 10155725

約数列:

[1, 3, 7, 21, 37, 111, 259, 777, 23131, 69393, 161917, 485751, 855847, 2567541, 5990929, 17972787]

約数ペア:

[(1, 17972787), (3, 5990929), (7, 2567541), (21, 855847), (37, 485751), (111, 161917), (259, 69393), (777, 23131)]