18666280

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1063}}^1$

素因数の和:1513

約数の個数: 32

約数和(自身を含む): 42134400

約数和(自身を除く): 23468120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1063, 1756, 2126, 2195, 3512, 4252, 4390, 5315, 8504, 8780, 10630, 17560, 21260, 42520, 466657, 933314, 1866628, 2333285, 3733256, 4666570, 9333140, 18666280]

約数ペア:

[(1, 18666280), (2, 9333140), (4, 4666570), (5, 3733256), (8, 2333285), (10, 1866628), (20, 933314), (40, 466657), (439, 42520), (878, 21260), (1063, 17560), (1756, 10630), (2126, 8780), (2195, 8504), (3512, 5315), (4252, 4390)]