20389887

素因数分解:

$3^5\times 7^1\times {\mathrm{11987}}^1$

素因数の和:12009

約数の個数: 24

約数和(自身を含む): 34909056

約数和(自身を除く): 14519169

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 11987, 35961, 83909, 107883, 251727, 323649, 755181, 970947, 2265543, 2912841, 6796629, 20389887]

約数ペア:

[(1, 20389887), (3, 6796629), (7, 2912841), (9, 2265543), (21, 970947), (27, 755181), (63, 323649), (81, 251727), (189, 107883), (243, 83909), (567, 35961), (1701, 11987)]