19798779

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{347}}^1$

素因数の和:400

約数の個数: 64

約数和(自身を含む): 37416960

約数和(自身を除く): 17618181

約数列:

[1, 3, 7, 11, 13, 19, 21, 33, 39, 57, 77, 91, 133, 143, 209, 231, 247, 273, 347, 399, 429, 627, 741, 1001, 1041, 1463, 1729, 2429, 2717, 3003, 3817, 4389, 4511, 5187, 6593, 7287, 8151, 11451, 13533, 19019, 19779, 26719, 31577, 46151, 49621, 57057, 72523, 80157, 85709, 94731, 138453, 148863, 217569, 257127, 347347, 507661, 599963, 942799, 1042041, 1522983, 1799889, 2828397, 6599593, 19798779]

約数ペア:

[(1, 19798779), (3, 6599593), (7, 2828397), (11, 1799889), (13, 1522983), (19, 1042041), (21, 942799), (33, 599963), (39, 507661), (57, 347347), (77, 257127), (91, 217569), (133, 148863), (143, 138453), (209, 94731), (231, 85709), (247, 80157), (273, 72523), (347, 57057), (399, 49621), (429, 46151), (627, 31577), (741, 26719), (1001, 19779), (1041, 19019), (1463, 13533), (1729, 11451), (2429, 8151), (2717, 7287), (3003, 6593), (3817, 5187), (4389, 4511)]