1998857

素因数分解:

$7^2\times {\mathrm{19}}^2\times {\mathrm{113}}^1$

素因数の和:165

約数の個数: 18

約数和(自身を含む): 2475738

約数和(自身を除く): 476881

約数列:

[1, 7, 19, 49, 113, 133, 361, 791, 931, 2147, 2527, 5537, 15029, 17689, 40793, 105203, 285551, 1998857]

約数ペア:

[(1, 1998857), (7, 285551), (19, 105203), (49, 40793), (113, 17689), (133, 15029), (361, 5537), (791, 2527), (931, 2147)]