19907709309

素因数分解:

$3^4\times {\mathrm{691}}^1\times {\mathrm{355679}}^1$

素因数の和:356382

約数の個数: 20

約数和(自身を含む): 29781797760

約数和(自身を除く): 9874088451

約数列:

[1, 3, 9, 27, 81, 691, 2073, 6219, 18657, 55971, 355679, 1067037, 3201111, 9603333, 28809999, 245774189, 737322567, 2211967701, 6635903103, 19907709309]

約数ペア:

[(1, 19907709309), (3, 6635903103), (9, 2211967701), (27, 737322567), (81, 245774189), (691, 28809999), (2073, 9603333), (6219, 3201111), (18657, 1067037), (55971, 355679)]