19860560

素因数分解:

$2^4\times 5^1\times {\mathrm{248257}}^1$

素因数の和:248270

約数の個数: 20

約数和(自身を含む): 46175988

約数和(自身を除く): 26315428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248257, 496514, 993028, 1241285, 1986056, 2482570, 3972112, 4965140, 9930280, 19860560]

約数ペア:

[(1, 19860560), (2, 9930280), (4, 4965140), (5, 3972112), (8, 2482570), (10, 1986056), (16, 1241285), (20, 993028), (40, 496514), (80, 248257)]