19549990

素因数分解:

$2^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{7607}}^1$

素因数の和:7871

約数の個数: 16

約数和(自身を含む): 35331552

約数和(自身を除く): 15781562

約数列:

[1, 2, 5, 10, 257, 514, 1285, 2570, 7607, 15214, 38035, 76070, 1954999, 3909998, 9774995, 19549990]

約数ペア:

[(1, 19549990), (2, 9774995), (5, 3909998), (10, 1954999), (257, 76070), (514, 38035), (1285, 15214), (2570, 7607)]