21785757

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{431}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 13050723

約数列:

[1, 3, 7, 21, 29, 83, 87, 203, 249, 431, 581, 609, 1293, 1743, 2407, 3017, 7221, 9051, 12499, 16849, 35773, 37497, 50547, 87493, 107319, 250411, 262479, 751233, 1037417, 3112251, 7261919, 21785757]

約数ペア:

[(1, 21785757), (3, 7261919), (7, 3112251), (21, 1037417), (29, 751233), (83, 262479), (87, 250411), (203, 107319), (249, 87493), (431, 50547), (581, 37497), (609, 35773), (1293, 16849), (1743, 12499), (2407, 9051), (3017, 7221)]