19760540

素因数分解:

$2^2\times 5^1\times {\mathrm{991}}^1\times {\mathrm{997}}^1$

素因数の和:1997

約数の個数: 24

約数和(自身を含む): 41580672

約数和(自身を除く): 21820132

約数列:

[1, 2, 4, 5, 10, 20, 991, 997, 1982, 1994, 3964, 3988, 4955, 4985, 9910, 9970, 19820, 19940, 988027, 1976054, 3952108, 4940135, 9880270, 19760540]

約数ペア:

[(1, 19760540), (2, 9880270), (4, 4940135), (5, 3952108), (10, 1976054), (20, 988027), (991, 19940), (997, 19820), (1982, 9970), (1994, 9910), (3964, 4985), (3988, 4955)]