20166705920

素因数分解:

$2^8\times 5^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1\times {\mathrm{947}}^1$

素因数の和:1226

約数の個数: 144

約数和(自身を含む): 49109372928

約数和(自身を除く): 28942667008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 131, 160, 254, 256, 262, 320, 508, 524, 635, 640, 655, 947, 1016, 1048, 1270, 1280, 1310, 1894, 2032, 2096, 2540, 2620, 3788, 4064, 4192, 4735, 5080, 5240, 7576, 8128, 8384, 9470, 10160, 10480, 15152, 16256, 16637, 16768, 18940, 20320, 20960, 30304, 32512, 33274, 33536, 37880, 40640, 41920, 60608, 66548, 75760, 81280, 83185, 83840, 120269, 121216, 124057, 133096, 151520, 162560, 166370, 167680, 240538, 242432, 248114, 266192, 303040, 332740, 481076, 496228, 532384, 601345, 606080, 620285, 665480, 962152, 992456, 1064768, 1202690, 1212160, 1240570, 1330960, 1924304, 1984912, 2129536, 2405380, 2481140, 2661920, 3848608, 3969824, 4259072, 4810760, 4962280, 5323840, 7697216, 7939648, 9621520, 9924560, 10647680, 15394432, 15755239, 15879296, 19243040, 19849120, 21295360, 30788864, 31510478, 31758592, 38486080, 39698240, 63020956, 76972160, 78776195, 79396480, 126041912, 153944320, 157552390, 158792960, 252083824, 315104780, 504167648, 630209560, 1008335296, 1260419120, 2016670592, 2520838240, 4033341184, 5041676480, 10083352960, 20166705920]

約数ペア:

[(1, 20166705920), (2, 10083352960), (4, 5041676480), (5, 4033341184), (8, 2520838240), (10, 2016670592), (16, 1260419120), (20, 1008335296), (32, 630209560), (40, 504167648), (64, 315104780), (80, 252083824), (127, 158792960), (128, 157552390), (131, 153944320), (160, 126041912), (254, 79396480), (256, 78776195), (262, 76972160), (320, 63020956), (508, 39698240), (524, 38486080), (635, 31758592), (640, 31510478), (655, 30788864), (947, 21295360), (1016, 19849120), (1048, 19243040), (1270, 15879296), (1280, 15755239), (1310, 15394432), (1894, 10647680), (2032, 9924560), (2096, 9621520), (2540, 7939648), (2620, 7697216), (3788, 5323840), (4064, 4962280), (4192, 4810760), (4735, 4259072), (5080, 3969824), (5240, 3848608), (7576, 2661920), (8128, 2481140), (8384, 2405380), (9470, 2129536), (10160, 1984912), (10480, 1924304), (15152, 1330960), (16256, 1240570), (16637, 1212160), (16768, 1202690), (18940, 1064768), (20320, 992456), (20960, 962152), (30304, 665480), (32512, 620285), (33274, 606080), (33536, 601345), (37880, 532384), (40640, 496228), (41920, 481076), (60608, 332740), (66548, 303040), (75760, 266192), (81280, 248114), (83185, 242432), (83840, 240538), (120269, 167680), (121216, 166370), (124057, 162560), (133096, 151520)]