19877870

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{27997}}^1$

素因数の和:28075

約数の個数: 16

約数和(自身を含む): 36285408

約数和(自身を除く): 16407538

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 27997, 55994, 139985, 279970, 1987787, 3975574, 9938935, 19877870]

約数ペア:

[(1, 19877870), (2, 9938935), (5, 3975574), (10, 1987787), (71, 279970), (142, 139985), (355, 55994), (710, 27997)]