20784393

素因数分解:

$3^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1907}}^1$

素因数の和:2093

約数の個数: 24

約数和(自身を含む): 34527168

約数和(自身を除く): 13742775

約数列:

[1, 3, 7, 9, 21, 63, 173, 519, 1211, 1557, 1907, 3633, 5721, 10899, 13349, 17163, 40047, 120141, 329911, 989733, 2309377, 2969199, 6928131, 20784393]

約数ペア:

[(1, 20784393), (3, 6928131), (7, 2969199), (9, 2309377), (21, 989733), (63, 329911), (173, 120141), (519, 40047), (1211, 17163), (1557, 13349), (1907, 10899), (3633, 5721)]