20357120

素因数分解:

$2^{13}\times 5^1\times 7^1\times {\mathrm{71}}^1$

素因数の和:109

約数の個数: 112

約数和(自身を含む): 56619648

約数和(自身を除く): 36262528

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 71, 80, 112, 128, 140, 142, 160, 224, 256, 280, 284, 320, 355, 448, 497, 512, 560, 568, 640, 710, 896, 994, 1024, 1120, 1136, 1280, 1420, 1792, 1988, 2048, 2240, 2272, 2485, 2560, 2840, 3584, 3976, 4096, 4480, 4544, 4970, 5120, 5680, 7168, 7952, 8192, 8960, 9088, 9940, 10240, 11360, 14336, 15904, 17920, 18176, 19880, 20480, 22720, 28672, 31808, 35840, 36352, 39760, 40960, 45440, 57344, 63616, 71680, 72704, 79520, 90880, 127232, 143360, 145408, 159040, 181760, 254464, 286720, 290816, 318080, 363520, 508928, 581632, 636160, 727040, 1017856, 1272320, 1454080, 2035712, 2544640, 2908160, 4071424, 5089280, 10178560, 20357120]

約数ペア:

[(1, 20357120), (2, 10178560), (4, 5089280), (5, 4071424), (7, 2908160), (8, 2544640), (10, 2035712), (14, 1454080), (16, 1272320), (20, 1017856), (28, 727040), (32, 636160), (35, 581632), (40, 508928), (56, 363520), (64, 318080), (70, 290816), (71, 286720), (80, 254464), (112, 181760), (128, 159040), (140, 145408), (142, 143360), (160, 127232), (224, 90880), (256, 79520), (280, 72704), (284, 71680), (320, 63616), (355, 57344), (448, 45440), (497, 40960), (512, 39760), (560, 36352), (568, 35840), (640, 31808), (710, 28672), (896, 22720), (994, 20480), (1024, 19880), (1120, 18176), (1136, 17920), (1280, 15904), (1420, 14336), (1792, 11360), (1988, 10240), (2048, 9940), (2240, 9088), (2272, 8960), (2485, 8192), (2560, 7952), (2840, 7168), (3584, 5680), (3976, 5120), (4096, 4970), (4480, 4544)]