19781319

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{397}}^1\times {\mathrm{977}}^1$

素因数の和:1394

約数の個数: 16

約数和(自身を含む): 28025568

約数和(自身を除く): 8244249

約数列:

[1, 3, 17, 51, 397, 977, 1191, 2931, 6749, 16609, 20247, 49827, 387869, 1163607, 6593773, 19781319]

約数ペア:

[(1, 19781319), (3, 6593773), (17, 1163607), (51, 387869), (397, 49827), (977, 20247), (1191, 16609), (2931, 6749)]