21003057

素因数分解:

$3^4\times {\mathrm{199}}^1\times {\mathrm{1303}}^1$

素因数の和:1514

約数の個数: 20

約数和(自身を含む): 31556800

約数和(自身を除く): 10553743

約数列:

[1, 3, 9, 27, 81, 199, 597, 1303, 1791, 3909, 5373, 11727, 16119, 35181, 105543, 259297, 777891, 2333673, 7001019, 21003057]

約数ペア:

[(1, 21003057), (3, 7001019), (9, 2333673), (27, 777891), (81, 259297), (199, 105543), (597, 35181), (1303, 16119), (1791, 11727), (3909, 5373)]