20191808525

素因数分解:

$5^2\times 7^2\times {\mathrm{191}}^1\times {\mathrm{211}}^1\times {\mathrm{409}}^1$

素因数の和:835

約数の個数: 72

約数和(自身を含む): 29488826880

約数和(自身を除く): 9297018355

約数列:

[1, 5, 7, 25, 35, 49, 175, 191, 211, 245, 409, 955, 1055, 1225, 1337, 1477, 2045, 2863, 4775, 5275, 6685, 7385, 9359, 10225, 10339, 14315, 20041, 33425, 36925, 40301, 46795, 51695, 71575, 78119, 86299, 100205, 201505, 233975, 258475, 282107, 390595, 431495, 501025, 546833, 604093, 1007525, 1410535, 1952975, 1974749, 2157475, 2734165, 3020465, 3827831, 4228651, 7052675, 9873745, 13670825, 15102325, 16483109, 19139155, 21143255, 49368725, 82415545, 95695775, 105716275, 115381763, 412077725, 576908815, 807672341, 2884544075, 4038361705, 20191808525]

約数ペア:

[(1, 20191808525), (5, 4038361705), (7, 2884544075), (25, 807672341), (35, 576908815), (49, 412077725), (175, 115381763), (191, 105716275), (211, 95695775), (245, 82415545), (409, 49368725), (955, 21143255), (1055, 19139155), (1225, 16483109), (1337, 15102325), (1477, 13670825), (2045, 9873745), (2863, 7052675), (4775, 4228651), (5275, 3827831), (6685, 3020465), (7385, 2734165), (9359, 2157475), (10225, 1974749), (10339, 1952975), (14315, 1410535), (20041, 1007525), (33425, 604093), (36925, 546833), (40301, 501025), (46795, 431495), (51695, 390595), (71575, 282107), (78119, 258475), (86299, 233975), (100205, 201505)]