19781253

素因数分解:

$3^4\times {\mathrm{103}}^1\times {\mathrm{2371}}^1$

素因数の和:2486

約数の個数: 20

約数和(自身を含む): 29849248

約数和(自身を除く): 10067995

約数列:

[1, 3, 9, 27, 81, 103, 309, 927, 2371, 2781, 7113, 8343, 21339, 64017, 192051, 244213, 732639, 2197917, 6593751, 19781253]

約数ペア:

[(1, 19781253), (3, 6593751), (9, 2197917), (27, 732639), (81, 244213), (103, 192051), (309, 64017), (927, 21339), (2371, 8343), (2781, 7113)]