21647871

素因数分解:

$3^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{2437}}^1$

素因数の和:2500

約数の個数: 32

約数和(自身を含む): 37447680

約数和(自身を除く): 15799809

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 141, 189, 329, 423, 987, 1269, 2437, 2961, 7311, 8883, 17059, 21933, 51177, 65799, 114539, 153531, 343617, 460593, 801773, 1030851, 2405319, 3092553, 7215957, 21647871]

約数ペア:

[(1, 21647871), (3, 7215957), (7, 3092553), (9, 2405319), (21, 1030851), (27, 801773), (47, 460593), (63, 343617), (141, 153531), (189, 114539), (329, 65799), (423, 51177), (987, 21933), (1269, 17059), (2437, 8883), (2961, 7311)]