3900020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1789}}^1$

素因数の和:1907

約数の個数: 24

約数和(自身を含む): 8269800

約数和(自身を除く): 4369780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 1789, 2180, 3578, 7156, 8945, 17890, 35780, 195001, 390002, 780004, 975005, 1950010, 3900020]

約数ペア:

[(1, 3900020), (2, 1950010), (4, 975005), (5, 780004), (10, 390002), (20, 195001), (109, 35780), (218, 17890), (436, 8945), (545, 7156), (1090, 3578), (1789, 2180)]