18244840

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1039}}^1$

素因数の和:1489

約数の個数: 32

約数和(自身を含む): 41184000

約数和(自身を除く): 22939160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1039, 1756, 2078, 2195, 3512, 4156, 4390, 5195, 8312, 8780, 10390, 17560, 20780, 41560, 456121, 912242, 1824484, 2280605, 3648968, 4561210, 9122420, 18244840]

約数ペア:

[(1, 18244840), (2, 9122420), (4, 4561210), (5, 3648968), (8, 2280605), (10, 1824484), (20, 912242), (40, 456121), (439, 41560), (878, 20780), (1039, 17560), (1756, 10390), (2078, 8780), (2195, 8312), (3512, 5195), (4156, 4390)]