261128385

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{20219}}^1$

素因数の和:20278

約数の個数: 48

約数和(自身を含む): 529925760

約数和(自身を除く): 268797375

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1845, 2583, 4305, 12915, 20219, 60657, 101095, 141533, 181971, 303285, 424599, 707665, 828979, 909855, 1273797, 2122995, 2486937, 4144895, 5802853, 6368985, 7460811, 12434685, 17408559, 29014265, 37304055, 52225677, 87042795, 261128385]

約数ペア:

[(1, 261128385), (3, 87042795), (5, 52225677), (7, 37304055), (9, 29014265), (15, 17408559), (21, 12434685), (35, 7460811), (41, 6368985), (45, 5802853), (63, 4144895), (105, 2486937), (123, 2122995), (205, 1273797), (287, 909855), (315, 828979), (369, 707665), (615, 424599), (861, 303285), (1435, 181971), (1845, 141533), (2583, 101095), (4305, 60657), (12915, 20219)]