19988320

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{277}}^1$

素因数の和:344

約数の個数: 96

約数和(自身を含む): 52962336

約数和(自身を除く): 32974016

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 41, 44, 55, 80, 82, 88, 110, 160, 164, 176, 205, 220, 277, 328, 352, 410, 440, 451, 554, 656, 820, 880, 902, 1108, 1312, 1385, 1640, 1760, 1804, 2216, 2255, 2770, 3047, 3280, 3608, 4432, 4510, 5540, 6094, 6560, 7216, 8864, 9020, 11080, 11357, 12188, 14432, 15235, 18040, 22160, 22714, 24376, 30470, 36080, 44320, 45428, 48752, 56785, 60940, 72160, 90856, 97504, 113570, 121880, 124927, 181712, 227140, 243760, 249854, 363424, 454280, 487520, 499708, 624635, 908560, 999416, 1249270, 1817120, 1998832, 2498540, 3997664, 4997080, 9994160, 19988320]

約数ペア:

[(1, 19988320), (2, 9994160), (4, 4997080), (5, 3997664), (8, 2498540), (10, 1998832), (11, 1817120), (16, 1249270), (20, 999416), (22, 908560), (32, 624635), (40, 499708), (41, 487520), (44, 454280), (55, 363424), (80, 249854), (82, 243760), (88, 227140), (110, 181712), (160, 124927), (164, 121880), (176, 113570), (205, 97504), (220, 90856), (277, 72160), (328, 60940), (352, 56785), (410, 48752), (440, 45428), (451, 44320), (554, 36080), (656, 30470), (820, 24376), (880, 22714), (902, 22160), (1108, 18040), (1312, 15235), (1385, 14432), (1640, 12188), (1760, 11357), (1804, 11080), (2216, 9020), (2255, 8864), (2770, 7216), (3047, 6560), (3280, 6094), (3608, 5540), (4432, 4510)]