20397909

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{3361}}^1$

素因数の和:3405

約数の個数: 24

約数和(自身を含む): 33028288

約数和(自身を除く): 12630379

約数列:

[1, 3, 7, 17, 21, 51, 119, 289, 357, 867, 2023, 3361, 6069, 10083, 23527, 57137, 70581, 171411, 399959, 971329, 1199877, 2913987, 6799303, 20397909]

約数ペア:

[(1, 20397909), (3, 6799303), (7, 2913987), (17, 1199877), (21, 971329), (51, 399959), (119, 171411), (289, 70581), (357, 57137), (867, 23527), (2023, 10083), (3361, 6069)]