20887569

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{191}}^1\times {\mathrm{419}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 31449600

約数和(自身を除く): 10562031

約数列:

[1, 3, 9, 29, 87, 191, 261, 419, 573, 1257, 1719, 3771, 5539, 12151, 16617, 36453, 49851, 80029, 109359, 240087, 720261, 2320841, 6962523, 20887569]

約数ペア:

[(1, 20887569), (3, 6962523), (9, 2320841), (29, 720261), (87, 240087), (191, 109359), (261, 80029), (419, 49851), (573, 36453), (1257, 16617), (1719, 12151), (3771, 5539)]