21986120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{42281}}^1$

素因数の和:42305

約数の個数: 32

約数和(自身を含む): 53275320

約数和(自身を除く): 31289200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 42281, 84562, 169124, 211405, 338248, 422810, 549653, 845620, 1099306, 1691240, 2198612, 2748265, 4397224, 5496530, 10993060, 21986120]

約数ペア:

[(1, 21986120), (2, 10993060), (4, 5496530), (5, 4397224), (8, 2748265), (10, 2198612), (13, 1691240), (20, 1099306), (26, 845620), (40, 549653), (52, 422810), (65, 338248), (104, 211405), (130, 169124), (260, 84562), (520, 42281)]