20407480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30011}}^1$

素因数の和:30039

約数の個数: 32

約数和(自身を含む): 48619440

約数和(自身を除く): 28211960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30011, 60022, 120044, 150055, 240088, 300110, 510187, 600220, 1020374, 1200440, 2040748, 2550935, 4081496, 5101870, 10203740, 20407480]

約数ペア:

[(1, 20407480), (2, 10203740), (4, 5101870), (5, 4081496), (8, 2550935), (10, 2040748), (17, 1200440), (20, 1020374), (34, 600220), (40, 510187), (68, 300110), (85, 240088), (136, 150055), (170, 120044), (340, 60022), (680, 30011)]