39720130

素因数分解:

$2^1\times 5^1\times {\mathrm{1987}}^1\times {\mathrm{1999}}^1$

素因数の和:3993

約数の個数: 16

約数和(自身を含む): 71568000

約数和(自身を除く): 31847870

約数列:

[1, 2, 5, 10, 1987, 1999, 3974, 3998, 9935, 9995, 19870, 19990, 3972013, 7944026, 19860065, 39720130]

約数ペア:

[(1, 39720130), (2, 19860065), (5, 7944026), (10, 3972013), (1987, 19990), (1999, 19870), (3974, 9995), (3998, 9935)]