21223209

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1237}}^1$

素因数の和:1309

約数の個数: 32

約数和(自身を含む): 34862080

約数和(自身を除く): 13638871

約数列:

[1, 3, 7, 19, 21, 43, 57, 129, 133, 301, 399, 817, 903, 1237, 2451, 3711, 5719, 8659, 17157, 23503, 25977, 53191, 70509, 159573, 164521, 372337, 493563, 1010629, 1117011, 3031887, 7074403, 21223209]

約数ペア:

[(1, 21223209), (3, 7074403), (7, 3031887), (19, 1117011), (21, 1010629), (43, 493563), (57, 372337), (129, 164521), (133, 159573), (301, 70509), (399, 53191), (817, 25977), (903, 23503), (1237, 17157), (2451, 8659), (3711, 5719)]