19720179

素因数分解:

$3^7\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:219

約数の個数: 32

約数和(自身を含む): 30228480

約数和(自身を除く): 10508301

約数列:

[1, 3, 9, 27, 71, 81, 127, 213, 243, 381, 639, 729, 1143, 1917, 2187, 3429, 5751, 9017, 10287, 17253, 27051, 30861, 51759, 81153, 92583, 155277, 243459, 277749, 730377, 2191131, 6573393, 19720179]

約数ペア:

[(1, 19720179), (3, 6573393), (9, 2191131), (27, 730377), (71, 277749), (81, 243459), (127, 155277), (213, 92583), (243, 81153), (381, 51759), (639, 30861), (729, 27051), (1143, 17253), (1917, 10287), (2187, 9017), (3429, 5751)]