20000925

素因数分解:

$3^4\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1$

素因数の和:129

約数の個数: 120

約数和(自身を含む): 45372096

約数和(自身を除く): 25371171

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 25, 27, 35, 45, 51, 63, 75, 81, 83, 85, 105, 119, 135, 153, 175, 189, 225, 249, 255, 315, 357, 405, 415, 425, 459, 525, 567, 581, 595, 675, 747, 765, 945, 1071, 1245, 1275, 1377, 1411, 1575, 1743, 1785, 2025, 2075, 2241, 2295, 2835, 2905, 2975, 3213, 3735, 3825, 4233, 4725, 5229, 5355, 6225, 6723, 6885, 7055, 8715, 8925, 9639, 9877, 11205, 11475, 12699, 14175, 14525, 15687, 16065, 18675, 21165, 26145, 26775, 29631, 33615, 34425, 35275, 38097, 43575, 47061, 48195, 49385, 56025, 63495, 78435, 80325, 88893, 105825, 114291, 130725, 148155, 168075, 190485, 235305, 240975, 246925, 266679, 317475, 392175, 444465, 571455, 740775, 800037, 952425, 1176525, 1333395, 2222325, 2857275, 4000185, 6666975, 20000925]

約数ペア:

[(1, 20000925), (3, 6666975), (5, 4000185), (7, 2857275), (9, 2222325), (15, 1333395), (17, 1176525), (21, 952425), (25, 800037), (27, 740775), (35, 571455), (45, 444465), (51, 392175), (63, 317475), (75, 266679), (81, 246925), (83, 240975), (85, 235305), (105, 190485), (119, 168075), (135, 148155), (153, 130725), (175, 114291), (189, 105825), (225, 88893), (249, 80325), (255, 78435), (315, 63495), (357, 56025), (405, 49385), (415, 48195), (425, 47061), (459, 43575), (525, 38097), (567, 35275), (581, 34425), (595, 33615), (675, 29631), (747, 26775), (765, 26145), (945, 21165), (1071, 18675), (1245, 16065), (1275, 15687), (1377, 14525), (1411, 14175), (1575, 12699), (1743, 11475), (1785, 11205), (2025, 9877), (2075, 9639), (2241, 8925), (2295, 8715), (2835, 7055), (2905, 6885), (2975, 6723), (3213, 6225), (3735, 5355), (3825, 5229), (4233, 4725)]