20995520

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1$

素因数の和:147

約数の個数: 168

約数和(自身を含む): 63239904

約数和(自身を除く): 42244384

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 49, 52, 56, 64, 65, 70, 80, 91, 98, 103, 104, 112, 130, 140, 160, 182, 196, 206, 208, 224, 245, 260, 280, 320, 364, 392, 412, 416, 448, 455, 490, 515, 520, 560, 637, 721, 728, 784, 824, 832, 910, 980, 1030, 1040, 1120, 1274, 1339, 1442, 1456, 1568, 1648, 1820, 1960, 2060, 2080, 2240, 2548, 2678, 2884, 2912, 3136, 3185, 3296, 3605, 3640, 3920, 4120, 4160, 5047, 5096, 5356, 5768, 5824, 6370, 6592, 6695, 7210, 7280, 7840, 8240, 9373, 10094, 10192, 10712, 11536, 12740, 13390, 14420, 14560, 15680, 16480, 18746, 20188, 20384, 21424, 23072, 25235, 25480, 26780, 28840, 29120, 32960, 37492, 40376, 40768, 42848, 46144, 46865, 50470, 50960, 53560, 57680, 65611, 74984, 80752, 85696, 93730, 100940, 101920, 107120, 115360, 131222, 149968, 161504, 187460, 201880, 203840, 214240, 230720, 262444, 299936, 323008, 328055, 374920, 403760, 428480, 524888, 599872, 656110, 749840, 807520, 1049776, 1312220, 1499680, 1615040, 2099552, 2624440, 2999360, 4199104, 5248880, 10497760, 20995520]

約数ペア:

[(1, 20995520), (2, 10497760), (4, 5248880), (5, 4199104), (7, 2999360), (8, 2624440), (10, 2099552), (13, 1615040), (14, 1499680), (16, 1312220), (20, 1049776), (26, 807520), (28, 749840), (32, 656110), (35, 599872), (40, 524888), (49, 428480), (52, 403760), (56, 374920), (64, 328055), (65, 323008), (70, 299936), (80, 262444), (91, 230720), (98, 214240), (103, 203840), (104, 201880), (112, 187460), (130, 161504), (140, 149968), (160, 131222), (182, 115360), (196, 107120), (206, 101920), (208, 100940), (224, 93730), (245, 85696), (260, 80752), (280, 74984), (320, 65611), (364, 57680), (392, 53560), (412, 50960), (416, 50470), (448, 46865), (455, 46144), (490, 42848), (515, 40768), (520, 40376), (560, 37492), (637, 32960), (721, 29120), (728, 28840), (784, 26780), (824, 25480), (832, 25235), (910, 23072), (980, 21424), (1030, 20384), (1040, 20188), (1120, 18746), (1274, 16480), (1339, 15680), (1442, 14560), (1456, 14420), (1568, 13390), (1648, 12740), (1820, 11536), (1960, 10712), (2060, 10192), (2080, 10094), (2240, 9373), (2548, 8240), (2678, 7840), (2884, 7280), (2912, 7210), (3136, 6695), (3185, 6592), (3296, 6370), (3605, 5824), (3640, 5768), (3920, 5356), (4120, 5096), (4160, 5047)]