19808751

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1\times {\mathrm{709}}^1$

素因数の和:918

約数の個数: 16

約数和(自身を含む): 27036800

約数和(自身を除く): 7228049

約数列:

[1, 3, 67, 139, 201, 417, 709, 2127, 9313, 27939, 47503, 98551, 142509, 295653, 6602917, 19808751]

約数ペア:

[(1, 19808751), (3, 6602917), (67, 295653), (139, 142509), (201, 98551), (417, 47503), (709, 27939), (2127, 9313)]