18609759

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2221}}^1$

素因数の和:2260

約数の個数: 36

約数和(自身を含む): 32930040

約数和(自身を除く): 14320281

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2221, 2793, 6663, 8379, 15547, 19989, 42199, 46641, 108829, 126597, 139923, 295393, 326487, 379791, 886179, 979461, 2067751, 2658537, 6203253, 18609759]

約数ペア:

[(1, 18609759), (3, 6203253), (7, 2658537), (9, 2067751), (19, 979461), (21, 886179), (49, 379791), (57, 326487), (63, 295393), (133, 139923), (147, 126597), (171, 108829), (399, 46641), (441, 42199), (931, 19989), (1197, 15547), (2221, 8379), (2793, 6663)]