20809785549

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7450693}}^1$

素因数の和:7450729

約数の個数: 24

約数和(自身を含む): 33975164640

約数和(自身を除く): 13165379091

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7450693, 22352079, 52154851, 141563167, 156464553, 365083957, 424689501, 990942169, 1095251871, 2972826507, 6936595183, 20809785549]

約数ペア:

[(1, 20809785549), (3, 6936595183), (7, 2972826507), (19, 1095251871), (21, 990942169), (49, 424689501), (57, 365083957), (133, 156464553), (147, 141563167), (399, 52154851), (931, 22352079), (2793, 7450693)]