21132279

素因数分解:

$3^3\times 7^2\times {\mathrm{15973}}^1$

素因数の和:15996

約数の個数: 24

約数和(自身を含む): 36420720

約数和(自身を除く): 15288441

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15973, 47919, 111811, 143757, 335433, 431271, 782677, 1006299, 2348031, 3018897, 7044093, 21132279]

約数ペア:

[(1, 21132279), (3, 7044093), (7, 3018897), (9, 2348031), (21, 1006299), (27, 782677), (49, 431271), (63, 335433), (147, 143757), (189, 111811), (441, 47919), (1323, 15973)]