20113475840

素因数分解:

$2^8\times 5^1\times {\mathrm{79}}^1\times {\mathrm{443}}^1\times {\mathrm{449}}^1$

素因数の和:992

約数の個数: 144

約数和(自身を含む): 49006944000

約数和(自身を除く): 28893468160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 256, 316, 320, 395, 443, 449, 632, 640, 790, 886, 898, 1264, 1280, 1580, 1772, 1796, 2215, 2245, 2528, 3160, 3544, 3592, 4430, 4490, 5056, 6320, 7088, 7184, 8860, 8980, 10112, 12640, 14176, 14368, 17720, 17960, 20224, 25280, 28352, 28736, 34997, 35440, 35471, 35920, 50560, 56704, 57472, 69994, 70880, 70942, 71840, 101120, 113408, 114944, 139988, 141760, 141884, 143680, 174985, 177355, 198907, 279976, 283520, 283768, 287360, 349970, 354710, 397814, 559952, 567040, 567536, 574720, 699940, 709420, 795628, 994535, 1119904, 1135072, 1399880, 1418840, 1591256, 1989070, 2239808, 2270144, 2799760, 2837680, 3182512, 3978140, 4479616, 4540288, 5599520, 5675360, 6365024, 7956280, 8959232, 9080576, 11199040, 11350720, 12730048, 15713653, 15912560, 22398080, 22701440, 25460096, 31427306, 31825120, 44796160, 45402880, 50920192, 62854612, 63650240, 78568265, 125709224, 127300480, 157136530, 251418448, 254600960, 314273060, 502836896, 628546120, 1005673792, 1257092240, 2011347584, 2514184480, 4022695168, 5028368960, 10056737920, 20113475840]

約数ペア:

[(1, 20113475840), (2, 10056737920), (4, 5028368960), (5, 4022695168), (8, 2514184480), (10, 2011347584), (16, 1257092240), (20, 1005673792), (32, 628546120), (40, 502836896), (64, 314273060), (79, 254600960), (80, 251418448), (128, 157136530), (158, 127300480), (160, 125709224), (256, 78568265), (316, 63650240), (320, 62854612), (395, 50920192), (443, 45402880), (449, 44796160), (632, 31825120), (640, 31427306), (790, 25460096), (886, 22701440), (898, 22398080), (1264, 15912560), (1280, 15713653), (1580, 12730048), (1772, 11350720), (1796, 11199040), (2215, 9080576), (2245, 8959232), (2528, 7956280), (3160, 6365024), (3544, 5675360), (3592, 5599520), (4430, 4540288), (4490, 4479616), (5056, 3978140), (6320, 3182512), (7088, 2837680), (7184, 2799760), (8860, 2270144), (8980, 2239808), (10112, 1989070), (12640, 1591256), (14176, 1418840), (14368, 1399880), (17720, 1135072), (17960, 1119904), (20224, 994535), (25280, 795628), (28352, 709420), (28736, 699940), (34997, 574720), (35440, 567536), (35471, 567040), (35920, 559952), (50560, 397814), (56704, 354710), (57472, 349970), (69994, 287360), (70880, 283768), (70942, 283520), (71840, 279976), (101120, 198907), (113408, 177355), (114944, 174985), (139988, 143680), (141760, 141884)]