21003885

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{509}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 42007680

約数和(自身を除く): 21003795

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 131, 315, 393, 509, 655, 917, 1179, 1527, 1965, 2545, 2751, 3563, 4581, 4585, 5895, 7635, 8253, 10689, 13755, 17815, 22905, 32067, 41265, 53445, 66679, 160335, 200037, 333395, 466753, 600111, 1000185, 1400259, 2333765, 3000555, 4200777, 7001295, 21003885]

約数ペア:

[(1, 21003885), (3, 7001295), (5, 4200777), (7, 3000555), (9, 2333765), (15, 1400259), (21, 1000185), (35, 600111), (45, 466753), (63, 333395), (105, 200037), (131, 160335), (315, 66679), (393, 53445), (509, 41265), (655, 32067), (917, 22905), (1179, 17815), (1527, 13755), (1965, 10689), (2545, 8253), (2751, 7635), (3563, 5895), (4581, 4585)]