20320880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{461}}^1$

素因数の和:522

約数の個数: 80

約数和(自身を含む): 51559200

約数和(自身を除く): 31238320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 29, 38, 40, 58, 76, 80, 95, 116, 145, 152, 190, 232, 290, 304, 380, 461, 464, 551, 580, 760, 922, 1102, 1160, 1520, 1844, 2204, 2305, 2320, 2755, 3688, 4408, 4610, 5510, 7376, 8759, 8816, 9220, 11020, 13369, 17518, 18440, 22040, 26738, 35036, 36880, 43795, 44080, 53476, 66845, 70072, 87590, 106952, 133690, 140144, 175180, 213904, 254011, 267380, 350360, 508022, 534760, 700720, 1016044, 1069520, 1270055, 2032088, 2540110, 4064176, 5080220, 10160440, 20320880]

約数ペア:

[(1, 20320880), (2, 10160440), (4, 5080220), (5, 4064176), (8, 2540110), (10, 2032088), (16, 1270055), (19, 1069520), (20, 1016044), (29, 700720), (38, 534760), (40, 508022), (58, 350360), (76, 267380), (80, 254011), (95, 213904), (116, 175180), (145, 140144), (152, 133690), (190, 106952), (232, 87590), (290, 70072), (304, 66845), (380, 53476), (461, 44080), (464, 43795), (551, 36880), (580, 35036), (760, 26738), (922, 22040), (1102, 18440), (1160, 17518), (1520, 13369), (1844, 11020), (2204, 9220), (2305, 8816), (2320, 8759), (2755, 7376), (3688, 5510), (4408, 4610)]