21288189

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28729}}^1$

素因数の和:28764

約数の個数: 16

約数和(自身を含む): 32177600

約数和(自身を除く): 10889411

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28729, 86187, 373477, 545851, 1120431, 1637553, 7096063, 21288189]

約数ペア:

[(1, 21288189), (3, 7096063), (13, 1637553), (19, 1120431), (39, 545851), (57, 373477), (247, 86187), (741, 28729)]