20949080

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1193}}^1$

素因数の和:1643

約数の個数: 32

約数和(自身を含む): 47282400

約数和(自身を除く): 26333320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1193, 1756, 2195, 2386, 3512, 4390, 4772, 5965, 8780, 9544, 11930, 17560, 23860, 47720, 523727, 1047454, 2094908, 2618635, 4189816, 5237270, 10474540, 20949080]

約数ペア:

[(1, 20949080), (2, 10474540), (4, 5237270), (5, 4189816), (8, 2618635), (10, 2094908), (20, 1047454), (40, 523727), (439, 47720), (878, 23860), (1193, 17560), (1756, 11930), (2195, 9544), (2386, 8780), (3512, 5965), (4390, 4772)]