20709715

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{409}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 28929600

約数和(自身を除く): 8219885

約数列:

[1, 5, 13, 19, 41, 65, 95, 205, 247, 409, 533, 779, 1235, 2045, 2665, 3895, 5317, 7771, 10127, 16769, 26585, 38855, 50635, 83845, 101023, 217997, 318611, 505115, 1089985, 1593055, 4141943, 20709715]

約数ペア:

[(1, 20709715), (5, 4141943), (13, 1593055), (19, 1089985), (41, 505115), (65, 318611), (95, 217997), (205, 101023), (247, 83845), (409, 50635), (533, 38855), (779, 26585), (1235, 16769), (2045, 10127), (2665, 7771), (3895, 5317)]