18810021

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 27498240

約数和(自身を除く): 8688219

約数列:

[1, 3, 23, 41, 61, 69, 109, 123, 183, 327, 943, 1403, 2501, 2507, 2829, 4209, 4469, 6649, 7503, 7521, 13407, 19947, 57523, 102787, 152927, 172569, 272609, 308361, 458781, 817827, 6270007, 18810021]

約数ペア:

[(1, 18810021), (3, 6270007), (23, 817827), (41, 458781), (61, 308361), (69, 272609), (109, 172569), (123, 152927), (183, 102787), (327, 57523), (943, 19947), (1403, 13407), (2501, 7521), (2507, 7503), (2829, 6649), (4209, 4469)]