20258560

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1$

素因数の和:71

約数の個数: 216

約数和(自身を含む): 62914320

約数和(自身を除く): 42655760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 19, 20, 28, 32, 34, 35, 38, 40, 49, 56, 64, 68, 70, 76, 80, 85, 95, 98, 112, 119, 128, 133, 136, 140, 152, 160, 170, 190, 196, 224, 238, 245, 256, 266, 272, 280, 304, 320, 323, 340, 380, 392, 448, 476, 490, 532, 544, 560, 595, 608, 640, 646, 665, 680, 760, 784, 833, 896, 931, 952, 980, 1064, 1088, 1120, 1190, 1216, 1280, 1292, 1330, 1360, 1520, 1568, 1615, 1666, 1792, 1862, 1904, 1960, 2128, 2176, 2240, 2261, 2380, 2432, 2584, 2660, 2720, 3040, 3136, 3230, 3332, 3724, 3808, 3920, 4165, 4256, 4352, 4480, 4522, 4655, 4760, 4864, 5168, 5320, 5440, 6080, 6272, 6460, 6664, 7448, 7616, 7840, 8330, 8512, 8960, 9044, 9310, 9520, 10336, 10640, 10880, 11305, 12160, 12544, 12920, 13328, 14896, 15232, 15680, 15827, 16660, 17024, 18088, 18620, 19040, 20672, 21280, 21760, 22610, 24320, 25840, 26656, 29792, 30464, 31360, 31654, 33320, 34048, 36176, 37240, 38080, 41344, 42560, 45220, 51680, 53312, 59584, 62720, 63308, 66640, 72352, 74480, 76160, 79135, 82688, 85120, 90440, 103360, 106624, 119168, 126616, 133280, 144704, 148960, 152320, 158270, 170240, 180880, 206720, 213248, 238336, 253232, 266560, 289408, 297920, 316540, 361760, 413440, 506464, 533120, 578816, 595840, 633080, 723520, 1012928, 1066240, 1191680, 1266160, 1447040, 2025856, 2532320, 2894080, 4051712, 5064640, 10129280, 20258560]

約数ペア:

[(1, 20258560), (2, 10129280), (4, 5064640), (5, 4051712), (7, 2894080), (8, 2532320), (10, 2025856), (14, 1447040), (16, 1266160), (17, 1191680), (19, 1066240), (20, 1012928), (28, 723520), (32, 633080), (34, 595840), (35, 578816), (38, 533120), (40, 506464), (49, 413440), (56, 361760), (64, 316540), (68, 297920), (70, 289408), (76, 266560), (80, 253232), (85, 238336), (95, 213248), (98, 206720), (112, 180880), (119, 170240), (128, 158270), (133, 152320), (136, 148960), (140, 144704), (152, 133280), (160, 126616), (170, 119168), (190, 106624), (196, 103360), (224, 90440), (238, 85120), (245, 82688), (256, 79135), (266, 76160), (272, 74480), (280, 72352), (304, 66640), (320, 63308), (323, 62720), (340, 59584), (380, 53312), (392, 51680), (448, 45220), (476, 42560), (490, 41344), (532, 38080), (544, 37240), (560, 36176), (595, 34048), (608, 33320), (640, 31654), (646, 31360), (665, 30464), (680, 29792), (760, 26656), (784, 25840), (833, 24320), (896, 22610), (931, 21760), (952, 21280), (980, 20672), (1064, 19040), (1088, 18620), (1120, 18088), (1190, 17024), (1216, 16660), (1280, 15827), (1292, 15680), (1330, 15232), (1360, 14896), (1520, 13328), (1568, 12920), (1615, 12544), (1666, 12160), (1792, 11305), (1862, 10880), (1904, 10640), (1960, 10336), (2128, 9520), (2176, 9310), (2240, 9044), (2261, 8960), (2380, 8512), (2432, 8330), (2584, 7840), (2660, 7616), (2720, 7448), (3040, 6664), (3136, 6460), (3230, 6272), (3332, 6080), (3724, 5440), (3808, 5320), (3920, 5168), (4165, 4864), (4256, 4760), (4352, 4655), (4480, 4522)]