18561921

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{6359}}^1$

素因数の和:6508

約数の個数: 16

約数和(自身を含む): 28492800

約数和(自身を除く): 9930879

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 6359, 19077, 44513, 133539, 883901, 2651703, 6187307, 18561921]

約数ペア:

[(1, 18561921), (3, 6187307), (7, 2651703), (21, 883901), (139, 133539), (417, 44513), (973, 19077), (2919, 6359)]