20981403

素因数分解:

$3^3\times {\mathrm{59}}^1\times {\mathrm{13171}}^1$

素因数の和:13239

約数の個数: 16

約数和(自身を含む): 31612800

約数和(自身を除く): 10631397

約数列:

[1, 3, 9, 27, 59, 177, 531, 1593, 13171, 39513, 118539, 355617, 777089, 2331267, 6993801, 20981403]

約数ペア:

[(1, 20981403), (3, 6993801), (9, 2331267), (27, 777089), (59, 355617), (177, 118539), (531, 39513), (1593, 13171)]