21047355

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{613}}^1$

素因数の和:740

約数の個数: 48

約数和(自身を含む): 42144960

約数和(自身を除く): 21097605

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 109, 315, 327, 545, 613, 763, 981, 1635, 1839, 2289, 3065, 3815, 4291, 4905, 5517, 6867, 9195, 11445, 12873, 21455, 27585, 34335, 38619, 64365, 66817, 193095, 200451, 334085, 467719, 601353, 1002255, 1403157, 2338595, 3006765, 4209471, 7015785, 21047355]

約数ペア:

[(1, 21047355), (3, 7015785), (5, 4209471), (7, 3006765), (9, 2338595), (15, 1403157), (21, 1002255), (35, 601353), (45, 467719), (63, 334085), (105, 200451), (109, 193095), (315, 66817), (327, 64365), (545, 38619), (613, 34335), (763, 27585), (981, 21455), (1635, 12873), (1839, 11445), (2289, 9195), (3065, 6867), (3815, 5517), (4291, 4905)]