19972407

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{491}}^1$

素因数の和:663

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 13089993

約数列:

[1, 3, 7, 13, 21, 39, 91, 149, 273, 447, 491, 1043, 1473, 1937, 3129, 3437, 5811, 6383, 10311, 13559, 19149, 40677, 44681, 73159, 134043, 219477, 512113, 951067, 1536339, 2853201, 6657469, 19972407]

約数ペア:

[(1, 19972407), (3, 6657469), (7, 2853201), (13, 1536339), (21, 951067), (39, 512113), (91, 219477), (149, 134043), (273, 73159), (447, 44681), (491, 40677), (1043, 19149), (1473, 13559), (1937, 10311), (3129, 6383), (3437, 5811)]