21141855

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1637}}^1$

素因数の和:1696

約数の個数: 48

約数和(自身を含む): 42928704

約数和(自身を除く): 21786849

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1637, 1845, 2583, 4305, 4911, 8185, 11459, 12915, 14733, 24555, 34377, 57295, 67117, 73665, 103131, 171885, 201351, 335585, 469819, 515655, 604053, 1006755, 1409457, 2349095, 3020265, 4228371, 7047285, 21141855]

約数ペア:

[(1, 21141855), (3, 7047285), (5, 4228371), (7, 3020265), (9, 2349095), (15, 1409457), (21, 1006755), (35, 604053), (41, 515655), (45, 469819), (63, 335585), (105, 201351), (123, 171885), (205, 103131), (287, 73665), (315, 67117), (369, 57295), (615, 34377), (861, 24555), (1435, 14733), (1637, 12915), (1845, 11459), (2583, 8185), (4305, 4911)]