20002003

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{2549}}^1$

素因数の和:2634

約数の個数: 16

約数和(自身を含む): 24480000

約数和(自身を除く): 4477997

約数列:

[1, 7, 19, 59, 133, 413, 1121, 2549, 7847, 17843, 48431, 150391, 339017, 1052737, 2857429, 20002003]

約数ペア:

[(1, 20002003), (7, 2857429), (19, 1052737), (59, 339017), (133, 150391), (413, 48431), (1121, 17843), (2549, 7847)]