21311115

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11939}}^1$

素因数の和:11971

約数の個数: 32

約数和(自身を含む): 41264640

約数和(自身を除く): 19953525

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11939, 35817, 59695, 83573, 179085, 202963, 250719, 417865, 608889, 1014815, 1253595, 1420741, 3044445, 4262223, 7103705, 21311115]

約数ペア:

[(1, 21311115), (3, 7103705), (5, 4262223), (7, 3044445), (15, 1420741), (17, 1253595), (21, 1014815), (35, 608889), (51, 417865), (85, 250719), (105, 202963), (119, 179085), (255, 83573), (357, 59695), (595, 35817), (1785, 11939)]