19747940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{13907}}^1$

素因数の和:13987

約数の個数: 24

約数和(自身を含む): 42057792

約数和(自身を除く): 22309852

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 13907, 27814, 55628, 69535, 139070, 278140, 987397, 1974794, 3949588, 4936985, 9873970, 19747940]

約数ペア:

[(1, 19747940), (2, 9873970), (4, 4936985), (5, 3949588), (10, 1974794), (20, 987397), (71, 278140), (142, 139070), (284, 69535), (355, 55628), (710, 27814), (1420, 13907)]