20408553

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{977}}^1$

素因数の和:1205

約数の個数: 24

約数和(自身を含む): 32344416

約数和(自身を除く): 11935863

約数列:

[1, 3, 9, 11, 33, 99, 211, 633, 977, 1899, 2321, 2931, 6963, 8793, 10747, 20889, 32241, 96723, 206147, 618441, 1855323, 2267617, 6802851, 20408553]

約数ペア:

[(1, 20408553), (3, 6802851), (9, 2267617), (11, 1855323), (33, 618441), (99, 206147), (211, 96723), (633, 32241), (977, 20889), (1899, 10747), (2321, 8793), (2931, 6963)]