21135897

素因数分解:

$3^6\times {\mathrm{79}}^1\times {\mathrm{367}}^1$

素因数の和:464

約数の個数: 28

約数和(自身を含む): 32177920

約数和(自身を除く): 11042023

約数列:

[1, 3, 9, 27, 79, 81, 237, 243, 367, 711, 729, 1101, 2133, 3303, 6399, 9909, 19197, 28993, 29727, 57591, 86979, 89181, 260937, 267543, 782811, 2348433, 7045299, 21135897]

約数ペア:

[(1, 21135897), (3, 7045299), (9, 2348433), (27, 782811), (79, 267543), (81, 260937), (237, 89181), (243, 86979), (367, 57591), (711, 29727), (729, 28993), (1101, 19197), (2133, 9909), (3303, 6399)]