20931428800

素因数分解:

$2^6\times 5^2\times {\mathrm{127}}^1\times {\mathrm{239}}^1\times {\mathrm{431}}^1$

素因数の和:819

約数の個数: 168

約数和(自身を含む): 52248084480

約数和(自身を除く): 31316655680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 127, 160, 200, 239, 254, 320, 400, 431, 478, 508, 635, 800, 862, 956, 1016, 1195, 1270, 1600, 1724, 1912, 2032, 2155, 2390, 2540, 3175, 3448, 3824, 4064, 4310, 4780, 5080, 5975, 6350, 6896, 7648, 8128, 8620, 9560, 10160, 10775, 11950, 12700, 13792, 15296, 17240, 19120, 20320, 21550, 23900, 25400, 27584, 30353, 34480, 38240, 40640, 43100, 47800, 50800, 54737, 60706, 68960, 76480, 86200, 95600, 101600, 103009, 109474, 121412, 137920, 151765, 172400, 191200, 203200, 206018, 218948, 242824, 273685, 303530, 344800, 382400, 412036, 437896, 485648, 515045, 547370, 607060, 689600, 758825, 824072, 875792, 971296, 1030090, 1094740, 1214120, 1368425, 1517650, 1648144, 1751584, 1942592, 2060180, 2189480, 2428240, 2575225, 2736850, 3035300, 3296288, 3503168, 4120360, 4378960, 4856480, 5150450, 5473700, 6070600, 6592576, 8240720, 8757920, 9712960, 10300900, 10947400, 12141200, 13082143, 16481440, 17515840, 20601800, 21894800, 24282400, 26164286, 32962880, 41203600, 43789600, 48564800, 52328572, 65410715, 82407200, 87579200, 104657144, 130821430, 164814400, 209314288, 261642860, 327053575, 418628576, 523285720, 654107150, 837257152, 1046571440, 1308214300, 2093142880, 2616428600, 4186285760, 5232857200, 10465714400, 20931428800]

約数ペア:

[(1, 20931428800), (2, 10465714400), (4, 5232857200), (5, 4186285760), (8, 2616428600), (10, 2093142880), (16, 1308214300), (20, 1046571440), (25, 837257152), (32, 654107150), (40, 523285720), (50, 418628576), (64, 327053575), (80, 261642860), (100, 209314288), (127, 164814400), (160, 130821430), (200, 104657144), (239, 87579200), (254, 82407200), (320, 65410715), (400, 52328572), (431, 48564800), (478, 43789600), (508, 41203600), (635, 32962880), (800, 26164286), (862, 24282400), (956, 21894800), (1016, 20601800), (1195, 17515840), (1270, 16481440), (1600, 13082143), (1724, 12141200), (1912, 10947400), (2032, 10300900), (2155, 9712960), (2390, 8757920), (2540, 8240720), (3175, 6592576), (3448, 6070600), (3824, 5473700), (4064, 5150450), (4310, 4856480), (4780, 4378960), (5080, 4120360), (5975, 3503168), (6350, 3296288), (6896, 3035300), (7648, 2736850), (8128, 2575225), (8620, 2428240), (9560, 2189480), (10160, 2060180), (10775, 1942592), (11950, 1751584), (12700, 1648144), (13792, 1517650), (15296, 1368425), (17240, 1214120), (19120, 1094740), (20320, 1030090), (21550, 971296), (23900, 875792), (25400, 824072), (27584, 758825), (30353, 689600), (34480, 607060), (38240, 547370), (40640, 515045), (43100, 485648), (47800, 437896), (50800, 412036), (54737, 382400), (60706, 344800), (68960, 303530), (76480, 273685), (86200, 242824), (95600, 218948), (101600, 206018), (103009, 203200), (109474, 191200), (121412, 172400), (137920, 151765)]