1668681

素因数分解:

$3^7\times 7^1\times {\mathrm{109}}^1$

素因数の和:137

約数の個数: 32

約数和(自身を含む): 2886400

約数和(自身を除く): 1217719

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 109, 189, 243, 327, 567, 729, 763, 981, 1701, 2187, 2289, 2943, 5103, 6867, 8829, 15309, 20601, 26487, 61803, 79461, 185409, 238383, 556227, 1668681]

約数ペア:

[(1, 1668681), (3, 556227), (7, 238383), (9, 185409), (21, 79461), (27, 61803), (63, 26487), (81, 20601), (109, 15309), (189, 8829), (243, 6867), (327, 5103), (567, 2943), (729, 2289), (763, 2187), (981, 1701)]