19901998

素因数分解:

$2^1\times {\mathrm{59}}^1\times {\mathrm{227}}^1\times {\mathrm{743}}^1$

素因数の和:1031

約数の個数: 16

約数和(自身を含む): 30533760

約数和(自身を除く): 10631762

約数列:

[1, 2, 59, 118, 227, 454, 743, 1486, 13393, 26786, 43837, 87674, 168661, 337322, 9950999, 19901998]

約数ペア:

[(1, 19901998), (2, 9950999), (59, 337322), (118, 168661), (227, 87674), (454, 43837), (743, 26786), (1486, 13393)]