19668920

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{1571}}^1$

素因数の和:1895

約数の個数: 32

約数和(自身を含む): 44424720

約数和(自身を除く): 24755800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 1571, 2504, 3130, 3142, 6260, 6284, 7855, 12520, 12568, 15710, 31420, 62840, 491723, 983446, 1966892, 2458615, 3933784, 4917230, 9834460, 19668920]

約数ペア:

[(1, 19668920), (2, 9834460), (4, 4917230), (5, 3933784), (8, 2458615), (10, 1966892), (20, 983446), (40, 491723), (313, 62840), (626, 31420), (1252, 15710), (1565, 12568), (1571, 12520), (2504, 7855), (3130, 6284), (3142, 6260)]