28667979

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:145

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 19716021

約数列:

[1, 3, 9, 19, 27, 29, 41, 47, 57, 87, 123, 141, 171, 261, 369, 423, 513, 551, 779, 783, 893, 1107, 1189, 1269, 1363, 1653, 1927, 2337, 2679, 3567, 4089, 4959, 5781, 7011, 8037, 10701, 12267, 14877, 17343, 21033, 22591, 24111, 25897, 32103, 36613, 36801, 52029, 55883, 67773, 77691, 109839, 167649, 203319, 233073, 329517, 502947, 609957, 699219, 988551, 1061777, 1508841, 3185331, 9555993, 28667979]

約数ペア:

[(1, 28667979), (3, 9555993), (9, 3185331), (19, 1508841), (27, 1061777), (29, 988551), (41, 699219), (47, 609957), (57, 502947), (87, 329517), (123, 233073), (141, 203319), (171, 167649), (261, 109839), (369, 77691), (423, 67773), (513, 55883), (551, 52029), (779, 36801), (783, 36613), (893, 32103), (1107, 25897), (1189, 24111), (1269, 22591), (1363, 21033), (1653, 17343), (1927, 14877), (2337, 12267), (2679, 10701), (3567, 8037), (4089, 7011), (4959, 5781)]