20897947

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{1163}}^1$

素因数の和:1338

約数の個数: 16

約数和(自身を含む): 25477632

約数和(自身を除く): 4579685

約数列:

[1, 7, 17, 119, 151, 1057, 1163, 2567, 8141, 17969, 19771, 138397, 175613, 1229291, 2985421, 20897947]

約数ペア:

[(1, 20897947), (7, 2985421), (17, 1229291), (119, 175613), (151, 138397), (1057, 19771), (1163, 17969), (2567, 8141)]