21252105

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{523}}^1$

素因数の和:587

約数の個数: 64

約数和(自身を含む): 44267520

約数和(自身を除く): 23015415

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 43, 45, 63, 105, 129, 135, 189, 215, 301, 315, 387, 523, 645, 903, 945, 1161, 1505, 1569, 1935, 2615, 2709, 3661, 4515, 4707, 5805, 7845, 8127, 10983, 13545, 14121, 18305, 22489, 23535, 32949, 40635, 54915, 67467, 70605, 98847, 112445, 157423, 164745, 202401, 337335, 472269, 494235, 607203, 787115, 1012005, 1416807, 2361345, 3036015, 4250421, 7084035, 21252105]

約数ペア:

[(1, 21252105), (3, 7084035), (5, 4250421), (7, 3036015), (9, 2361345), (15, 1416807), (21, 1012005), (27, 787115), (35, 607203), (43, 494235), (45, 472269), (63, 337335), (105, 202401), (129, 164745), (135, 157423), (189, 112445), (215, 98847), (301, 70605), (315, 67467), (387, 54915), (523, 40635), (645, 32949), (903, 23535), (945, 22489), (1161, 18305), (1505, 14121), (1569, 13545), (1935, 10983), (2615, 8127), (2709, 7845), (3661, 5805), (4515, 4707)]