21499065

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{521}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 42996096

約数和(自身を除く): 21497031

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 131, 315, 393, 521, 655, 917, 1179, 1563, 1965, 2605, 2751, 3647, 4585, 4689, 5895, 7815, 8253, 10941, 13755, 18235, 23445, 32823, 41265, 54705, 68251, 164115, 204753, 341255, 477757, 614259, 1023765, 1433271, 2388785, 3071295, 4299813, 7166355, 21499065]

約数ペア:

[(1, 21499065), (3, 7166355), (5, 4299813), (7, 3071295), (9, 2388785), (15, 1433271), (21, 1023765), (35, 614259), (45, 477757), (63, 341255), (105, 204753), (131, 164115), (315, 68251), (393, 54705), (521, 41265), (655, 32823), (917, 23445), (1179, 18235), (1563, 13755), (1965, 10941), (2605, 8253), (2751, 7815), (3647, 5895), (4585, 4689)]