21081585

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:198

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19560975

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 59, 83, 105, 123, 177, 205, 249, 287, 295, 413, 415, 581, 615, 861, 885, 1239, 1245, 1435, 1743, 2065, 2419, 2905, 3403, 4305, 4897, 6195, 7257, 8715, 10209, 12095, 14691, 16933, 17015, 23821, 24485, 34279, 36285, 50799, 51045, 71463, 73455, 84665, 102837, 119105, 171395, 200777, 253995, 357315, 514185, 602331, 1003885, 1405439, 3011655, 4216317, 7027195, 21081585]

約数ペア:

[(1, 21081585), (3, 7027195), (5, 4216317), (7, 3011655), (15, 1405439), (21, 1003885), (35, 602331), (41, 514185), (59, 357315), (83, 253995), (105, 200777), (123, 171395), (177, 119105), (205, 102837), (249, 84665), (287, 73455), (295, 71463), (413, 51045), (415, 50799), (581, 36285), (615, 34279), (861, 24485), (885, 23821), (1239, 17015), (1245, 16933), (1435, 14691), (1743, 12095), (2065, 10209), (2419, 8715), (2905, 7257), (3403, 6195), (4305, 4897)]