21705495

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^2\times {\mathrm{151}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 41061888

約数和(自身を除く): 19356393

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 105, 111, 151, 185, 259, 453, 555, 755, 777, 1057, 1295, 1369, 2265, 3171, 3885, 4107, 5285, 5587, 6845, 9583, 15855, 16761, 20535, 27935, 28749, 39109, 47915, 83805, 117327, 143745, 195545, 206719, 586635, 620157, 1033595, 1447033, 3100785, 4341099, 7235165, 21705495]

約数ペア:

[(1, 21705495), (3, 7235165), (5, 4341099), (7, 3100785), (15, 1447033), (21, 1033595), (35, 620157), (37, 586635), (105, 206719), (111, 195545), (151, 143745), (185, 117327), (259, 83805), (453, 47915), (555, 39109), (755, 28749), (777, 27935), (1057, 20535), (1295, 16761), (1369, 15855), (2265, 9583), (3171, 6845), (3885, 5587), (4107, 5285)]