20407601920

素因数分解:

$2^8\times 5^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{4987}}^1$

素因数の和:5170

約数の個数: 144

約数和(自身を含む): 51385178880

約数和(自身を除く): 30977576960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 139, 160, 184, 230, 256, 278, 320, 368, 460, 556, 640, 695, 736, 920, 1112, 1280, 1390, 1472, 1840, 2224, 2780, 2944, 3197, 3680, 4448, 4987, 5560, 5888, 6394, 7360, 8896, 9974, 11120, 12788, 14720, 15985, 17792, 19948, 22240, 24935, 25576, 29440, 31970, 35584, 39896, 44480, 49870, 51152, 63940, 79792, 88960, 99740, 102304, 114701, 127880, 159584, 177920, 199480, 204608, 229402, 255760, 319168, 398960, 409216, 458804, 511520, 573505, 638336, 693193, 797920, 818432, 917608, 1023040, 1147010, 1276672, 1386386, 1595840, 1835216, 2046080, 2294020, 2772772, 3191680, 3465965, 3670432, 4092160, 4588040, 5545544, 6383360, 6931930, 7340864, 9176080, 11091088, 13863860, 14681728, 15943439, 18352160, 22182176, 27727720, 29363456, 31886878, 36704320, 44364352, 55455440, 63773756, 73408640, 79717195, 88728704, 110910880, 127547512, 146817280, 159434390, 177457408, 221821760, 255095024, 318868780, 443643520, 510190048, 637737560, 887287040, 1020380096, 1275475120, 2040760192, 2550950240, 4081520384, 5101900480, 10203800960, 20407601920]

約数ペア:

[(1, 20407601920), (2, 10203800960), (4, 5101900480), (5, 4081520384), (8, 2550950240), (10, 2040760192), (16, 1275475120), (20, 1020380096), (23, 887287040), (32, 637737560), (40, 510190048), (46, 443643520), (64, 318868780), (80, 255095024), (92, 221821760), (115, 177457408), (128, 159434390), (139, 146817280), (160, 127547512), (184, 110910880), (230, 88728704), (256, 79717195), (278, 73408640), (320, 63773756), (368, 55455440), (460, 44364352), (556, 36704320), (640, 31886878), (695, 29363456), (736, 27727720), (920, 22182176), (1112, 18352160), (1280, 15943439), (1390, 14681728), (1472, 13863860), (1840, 11091088), (2224, 9176080), (2780, 7340864), (2944, 6931930), (3197, 6383360), (3680, 5545544), (4448, 4588040), (4987, 4092160), (5560, 3670432), (5888, 3465965), (6394, 3191680), (7360, 2772772), (8896, 2294020), (9974, 2046080), (11120, 1835216), (12788, 1595840), (14720, 1386386), (15985, 1276672), (17792, 1147010), (19948, 1023040), (22240, 917608), (24935, 818432), (25576, 797920), (29440, 693193), (31970, 638336), (35584, 573505), (39896, 511520), (44480, 458804), (49870, 409216), (51152, 398960), (63940, 319168), (79792, 255760), (88960, 229402), (99740, 204608), (102304, 199480), (114701, 177920), (127880, 159584)]