20579979

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{3391}}^1$

素因数の和:3435

約数の個数: 24

約数和(自身を含む): 33323008

約数和(自身を除く): 12743029

約数列:

[1, 3, 7, 17, 21, 51, 119, 289, 357, 867, 2023, 3391, 6069, 10173, 23737, 57647, 71211, 172941, 403529, 979999, 1210587, 2939997, 6859993, 20579979]

約数ペア:

[(1, 20579979), (3, 6859993), (7, 2939997), (17, 1210587), (21, 979999), (51, 403529), (119, 172941), (289, 71211), (357, 57647), (867, 23737), (2023, 10173), (3391, 6069)]