21355659

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{523}}^1$

素因数の和:891

約数の個数: 24

約数和(自身を含む): 33378800

約数和(自身を除く): 12023141

約数列:

[1, 3, 9, 13, 39, 117, 349, 523, 1047, 1569, 3141, 4537, 4707, 6799, 13611, 20397, 40833, 61191, 182527, 547581, 1642743, 2372851, 7118553, 21355659]

約数ペア:

[(1, 21355659), (3, 7118553), (9, 2372851), (13, 1642743), (39, 547581), (117, 182527), (349, 61191), (523, 40833), (1047, 20397), (1569, 13611), (3141, 6799), (4537, 4707)]