20707225

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{347}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 33140736

約数和(自身を除く): 12433511

約数列:

[1, 5, 7, 11, 25, 31, 35, 55, 77, 155, 175, 217, 275, 341, 347, 385, 775, 1085, 1705, 1735, 1925, 2387, 2429, 3817, 5425, 8525, 8675, 10757, 11935, 12145, 19085, 26719, 53785, 59675, 60725, 75299, 95425, 118327, 133595, 268925, 376495, 591635, 667975, 828289, 1882475, 2958175, 4141445, 20707225]

約数ペア:

[(1, 20707225), (5, 4141445), (7, 2958175), (11, 1882475), (25, 828289), (31, 667975), (35, 591635), (55, 376495), (77, 268925), (155, 133595), (175, 118327), (217, 95425), (275, 75299), (341, 60725), (347, 59675), (385, 53785), (775, 26719), (1085, 19085), (1705, 12145), (1735, 11935), (1925, 10757), (2387, 8675), (2429, 8525), (3817, 5425)]