78401421

素因数分解:

$3^2\times 7^2\times {\mathrm{139}}^1\times {\mathrm{1279}}^1$

素因数の和:1438

約数の個数: 36

約数和(自身を含む): 132787200

約数和(自身を除く): 54385779

約数列:

[1, 3, 7, 9, 21, 49, 63, 139, 147, 417, 441, 973, 1251, 1279, 2919, 3837, 6811, 8757, 8953, 11511, 20433, 26859, 61299, 62671, 80577, 177781, 188013, 533343, 564039, 1244467, 1600029, 3733401, 8711269, 11200203, 26133807, 78401421]

約数ペア:

[(1, 78401421), (3, 26133807), (7, 11200203), (9, 8711269), (21, 3733401), (49, 1600029), (63, 1244467), (139, 564039), (147, 533343), (417, 188013), (441, 177781), (973, 80577), (1251, 62671), (1279, 61299), (2919, 26859), (3837, 20433), (6811, 11511), (8757, 8953)]