20891283

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{421}}^1$

素因数の和:587

約数の個数: 32

約数和(自身を含む): 34030080

約数和(自身を除く): 13138797

約数列:

[1, 3, 7, 17, 21, 51, 119, 139, 357, 417, 421, 973, 1263, 2363, 2919, 2947, 7089, 7157, 8841, 16541, 21471, 49623, 50099, 58519, 150297, 175557, 409633, 994823, 1228899, 2984469, 6963761, 20891283]

約数ペア:

[(1, 20891283), (3, 6963761), (7, 2984469), (17, 1228899), (21, 994823), (51, 409633), (119, 175557), (139, 150297), (357, 58519), (417, 50099), (421, 49623), (973, 21471), (1263, 16541), (2363, 8841), (2919, 7157), (2947, 7089)]