21057040

素因数分解:

$2^4\times 5^1\times {\mathrm{263213}}^1$

素因数の和:263226

約数の個数: 20

約数和(自身を含む): 48957804

約数和(自身を除く): 27900764

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263213, 526426, 1052852, 1316065, 2105704, 2632130, 4211408, 5264260, 10528520, 21057040]

約数ペア:

[(1, 21057040), (2, 10528520), (4, 5264260), (5, 4211408), (8, 2632130), (10, 2105704), (16, 1316065), (20, 1052852), (40, 526426), (80, 263213)]