81319221

素因数分解:

$3^7\times {\mathrm{19}}^2\times {\mathrm{103}}^1$

素因数の和:162

約数の個数: 48

約数和(自身を含む): 129966720

約数和(自身を除く): 48647499

約数列:

[1, 3, 9, 19, 27, 57, 81, 103, 171, 243, 309, 361, 513, 729, 927, 1083, 1539, 1957, 2187, 2781, 3249, 4617, 5871, 8343, 9747, 13851, 17613, 25029, 29241, 37183, 41553, 52839, 75087, 87723, 111549, 158517, 225261, 263169, 334647, 475551, 789507, 1003941, 1426653, 3011823, 4279959, 9035469, 27106407, 81319221]

約数ペア:

[(1, 81319221), (3, 27106407), (9, 9035469), (19, 4279959), (27, 3011823), (57, 1426653), (81, 1003941), (103, 789507), (171, 475551), (243, 334647), (309, 263169), (361, 225261), (513, 158517), (729, 111549), (927, 87723), (1083, 75087), (1539, 52839), (1957, 41553), (2187, 37183), (2781, 29241), (3249, 25029), (4617, 17613), (5871, 13851), (8343, 9747)]