18211905

素因数分解:

$3^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{431}}^1$

素因数の和:758

約数の個数: 32

約数和(自身を含む): 32555520

約数和(自身を除く): 14343615

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 313, 431, 939, 1293, 1565, 2155, 2817, 3879, 4695, 6465, 8451, 11637, 14085, 19395, 42255, 58185, 134903, 404709, 674515, 1214127, 2023545, 3642381, 6070635, 18211905]

約数ペア:

[(1, 18211905), (3, 6070635), (5, 3642381), (9, 2023545), (15, 1214127), (27, 674515), (45, 404709), (135, 134903), (313, 58185), (431, 42255), (939, 19395), (1293, 14085), (1565, 11637), (2155, 8451), (2817, 6465), (3879, 4695)]