21379407

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{21661}}^1$

素因数の和:21718

約数の個数: 16

約数和(自身を含む): 33272832

約数和(自身を除く): 11893425

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 21661, 64983, 151627, 454881, 1018067, 3054201, 7126469, 21379407]

約数ペア:

[(1, 21379407), (3, 7126469), (7, 3054201), (21, 1018067), (47, 454881), (141, 151627), (329, 64983), (987, 21661)]