20990961

素因数分解:

$3^3\times {\mathrm{59}}^1\times {\mathrm{13177}}^1$

素因数の和:13245

約数の個数: 16

約数和(自身を含む): 31627200

約数和(自身を除く): 10636239

約数列:

[1, 3, 9, 27, 59, 177, 531, 1593, 13177, 39531, 118593, 355779, 777443, 2332329, 6996987, 20990961]

約数ペア:

[(1, 20990961), (3, 6996987), (9, 2332329), (27, 777443), (59, 355779), (177, 118593), (531, 39531), (1593, 13177)]