21191639

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{4813}}^1$

素因数の和:4874

約数の個数: 16

約数和(自身を含む): 26342208

約数和(自身を除く): 5150569

約数列:

[1, 7, 17, 37, 119, 259, 629, 4403, 4813, 33691, 81821, 178081, 572747, 1246567, 3027377, 21191639]

約数ペア:

[(1, 21191639), (7, 3027377), (17, 1246567), (37, 572747), (119, 178081), (259, 81821), (629, 33691), (4403, 4813)]