39521080

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{997}}^1$

素因数の和:1999

約数の個数: 32

約数和(自身を含む): 89101440

約数和(自身を除く): 49580360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 997, 1982, 1994, 3964, 3988, 4955, 4985, 7928, 7976, 9910, 9970, 19820, 19940, 39640, 39880, 988027, 1976054, 3952108, 4940135, 7904216, 9880270, 19760540, 39521080]

約数ペア:

[(1, 39521080), (2, 19760540), (4, 9880270), (5, 7904216), (8, 4940135), (10, 3952108), (20, 1976054), (40, 988027), (991, 39880), (997, 39640), (1982, 19940), (1994, 19820), (3964, 9970), (3988, 9910), (4955, 7976), (4985, 7928)]