20405439

素因数分解:

$3^6\times {\mathrm{23}}^1\times {\mathrm{1217}}^1$

素因数の和:1258

約数の個数: 28

約数和(自身を含む): 31950576

約数和(自身を除く): 11545137

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 243, 621, 729, 1217, 1863, 3651, 5589, 10953, 16767, 27991, 32859, 83973, 98577, 251919, 295731, 755757, 887193, 2267271, 6801813, 20405439]

約数ペア:

[(1, 20405439), (3, 6801813), (9, 2267271), (23, 887193), (27, 755757), (69, 295731), (81, 251919), (207, 98577), (243, 83973), (621, 32859), (729, 27991), (1217, 16767), (1863, 10953), (3651, 5589)]