20667555

素因数分解:

$3^4\times 5^1\times {\mathrm{51031}}^1$

素因数の和:51048

約数の個数: 20

約数和(自身を含む): 37049232

約数和(自身を除く): 16381677

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51031, 153093, 255155, 459279, 765465, 1377837, 2296395, 4133511, 6889185, 20667555]

約数ペア:

[(1, 20667555), (3, 6889185), (5, 4133511), (9, 2296395), (15, 1377837), (27, 765465), (45, 459279), (81, 255155), (135, 153093), (405, 51031)]