18980560

素因数分解:

$2^4\times 5^1\times {\mathrm{237257}}^1$

素因数の和:237270

約数の個数: 20

約数和(自身を含む): 44129988

約数和(自身を除く): 25149428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 237257, 474514, 949028, 1186285, 1898056, 2372570, 3796112, 4745140, 9490280, 18980560]

約数ペア:

[(1, 18980560), (2, 9490280), (4, 4745140), (5, 3796112), (8, 2372570), (10, 1898056), (16, 1186285), (20, 949028), (40, 474514), (80, 237257)]