21908145

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{727}}^1$

素因数の和:790

約数の個数: 48

約数和(自身を含む): 41827968

約数和(自身を除く): 19919823

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 49, 105, 123, 147, 205, 245, 287, 615, 727, 735, 861, 1435, 2009, 2181, 3635, 4305, 5089, 6027, 10045, 10905, 15267, 25445, 29807, 30135, 35623, 76335, 89421, 106869, 149035, 178115, 208649, 447105, 534345, 625947, 1043245, 1460543, 3129735, 4381629, 7302715, 21908145]

約数ペア:

[(1, 21908145), (3, 7302715), (5, 4381629), (7, 3129735), (15, 1460543), (21, 1043245), (35, 625947), (41, 534345), (49, 447105), (105, 208649), (123, 178115), (147, 149035), (205, 106869), (245, 89421), (287, 76335), (615, 35623), (727, 30135), (735, 29807), (861, 25445), (1435, 15267), (2009, 10905), (2181, 10045), (3635, 6027), (4305, 5089)]