19870210

素因数分解:

$2^1\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1993}}^1$

素因数の和:2997

約数の個数: 16

約数和(自身を含む): 35820216

約数和(自身を除く): 15950006

約数列:

[1, 2, 5, 10, 997, 1993, 1994, 3986, 4985, 9965, 9970, 19930, 1987021, 3974042, 9935105, 19870210]

約数ペア:

[(1, 19870210), (2, 9935105), (5, 3974042), (10, 1987021), (997, 19930), (1993, 9970), (1994, 9965), (3986, 4985)]