21831425

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1031}}^1$

素因数の和:1070

約数の個数: 36

約数和(自身を含む): 34039488

約数和(自身を除く): 12208063

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 121, 175, 275, 385, 605, 847, 1031, 1925, 3025, 4235, 5155, 7217, 11341, 21175, 25775, 36085, 56705, 79387, 124751, 180425, 283525, 396935, 623755, 873257, 1984675, 3118775, 4366285, 21831425]

約数ペア:

[(1, 21831425), (5, 4366285), (7, 3118775), (11, 1984675), (25, 873257), (35, 623755), (55, 396935), (77, 283525), (121, 180425), (175, 124751), (275, 79387), (385, 56705), (605, 36085), (847, 25775), (1031, 21175), (1925, 11341), (3025, 7217), (4235, 5155)]