21192780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50459}}^1$

素因数の和:50478

約数の個数: 48

約数和(自身を含む): 67818240

約数和(自身を除く): 46625460

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 50459, 100918, 151377, 201836, 252295, 302754, 353213, 504590, 605508, 706426, 756885, 1009180, 1059639, 1412852, 1513770, 1766065, 2119278, 3027540, 3532130, 4238556, 5298195, 7064260, 10596390, 21192780]

約数ペア:

[(1, 21192780), (2, 10596390), (3, 7064260), (4, 5298195), (5, 4238556), (6, 3532130), (7, 3027540), (10, 2119278), (12, 1766065), (14, 1513770), (15, 1412852), (20, 1059639), (21, 1009180), (28, 756885), (30, 706426), (35, 605508), (42, 504590), (60, 353213), (70, 302754), (84, 252295), (105, 201836), (140, 151377), (210, 100918), (420, 50459)]