21257308

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{1693}}^1$

素因数の和:1813

約数の個数: 24

約数和(自身を含む): 38609648

約数和(自身を除く): 17352340

約数列:

[1, 2, 4, 43, 73, 86, 146, 172, 292, 1693, 3139, 3386, 6278, 6772, 12556, 72799, 123589, 145598, 247178, 291196, 494356, 5314327, 10628654, 21257308]

約数ペア:

[(1, 21257308), (2, 10628654), (4, 5314327), (43, 494356), (73, 291196), (86, 247178), (146, 145598), (172, 123589), (292, 72799), (1693, 12556), (3139, 6772), (3386, 6278)]