19905711

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7127}}^1$

素因数の和:7163

約数の個数: 24

約数和(自身を含む): 32503680

約数和(自身を除く): 12597969

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7127, 21381, 49889, 135413, 149667, 349223, 406239, 947891, 1047669, 2843673, 6635237, 19905711]

約数ペア:

[(1, 19905711), (3, 6635237), (7, 2843673), (19, 1047669), (21, 947891), (49, 406239), (57, 349223), (133, 149667), (147, 135413), (399, 49889), (931, 21381), (2793, 7127)]