19657580

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1931}}^1$

素因数の和:2449

約数の個数: 24

約数和(自身を含む): 41383440

約数和(自身を除く): 21725860

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1931, 2036, 2545, 3862, 5090, 7724, 9655, 10180, 19310, 38620, 982879, 1965758, 3931516, 4914395, 9828790, 19657580]

約数ペア:

[(1, 19657580), (2, 9828790), (4, 4914395), (5, 3931516), (10, 1965758), (20, 982879), (509, 38620), (1018, 19310), (1931, 10180), (2036, 9655), (2545, 7724), (3862, 5090)]