21471387

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53813}}^1$

素因数の和:53842

約数の個数: 16

約数和(自身を含む): 34440960

約数和(自身を除く): 12969573

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53813, 161439, 376691, 1022447, 1130073, 3067341, 7157129, 21471387]

約数ペア:

[(1, 21471387), (3, 7157129), (7, 3067341), (19, 1130073), (21, 1022447), (57, 376691), (133, 161439), (399, 53813)]