20972511

素因数分解:

$3^2\times 7^1\times {\mathrm{463}}^1\times {\mathrm{719}}^1$

素因数の和:1195

約数の個数: 24

約数和(自身を含む): 34744320

約数和(自身を除く): 13771809

約数列:

[1, 3, 7, 9, 21, 63, 463, 719, 1389, 2157, 3241, 4167, 5033, 6471, 9723, 15099, 29169, 45297, 332897, 998691, 2330279, 2996073, 6990837, 20972511]

約数ペア:

[(1, 20972511), (3, 6990837), (7, 2996073), (9, 2330279), (21, 998691), (63, 332897), (463, 45297), (719, 29169), (1389, 15099), (2157, 9723), (3241, 6471), (4167, 5033)]