21109431

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{241}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 33392128

約数和(自身を除く): 12282697

約数列:

[1, 3, 7, 21, 43, 97, 129, 241, 291, 301, 679, 723, 903, 1687, 2037, 4171, 5061, 10363, 12513, 23377, 29197, 31089, 70131, 72541, 87591, 163639, 217623, 490917, 1005211, 3015633, 7036477, 21109431]

約数ペア:

[(1, 21109431), (3, 7036477), (7, 3015633), (21, 1005211), (43, 490917), (97, 217623), (129, 163639), (241, 87591), (291, 72541), (301, 70131), (679, 31089), (723, 29197), (903, 23377), (1687, 12513), (2037, 10363), (4171, 5061)]