28557789

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:162

約数の個数: 48

約数和(自身を含む): 44974080

約数和(自身を除く): 16416291

約数列:

[1, 3, 13, 23, 31, 39, 69, 79, 93, 169, 237, 299, 403, 507, 713, 897, 1027, 1209, 1817, 2139, 2449, 3081, 3887, 5239, 5451, 7347, 9269, 11661, 13351, 15717, 23621, 27807, 31837, 40053, 56327, 70863, 95511, 120497, 168981, 307073, 361491, 413881, 732251, 921219, 1241643, 2196753, 9519263, 28557789]

約数ペア:

[(1, 28557789), (3, 9519263), (13, 2196753), (23, 1241643), (31, 921219), (39, 732251), (69, 413881), (79, 361491), (93, 307073), (169, 168981), (237, 120497), (299, 95511), (403, 70863), (507, 56327), (713, 40053), (897, 31837), (1027, 27807), (1209, 23621), (1817, 15717), (2139, 13351), (2449, 11661), (3081, 9269), (3887, 7347), (5239, 5451)]