20218880

素因数分解:

$2^{10}\times 5^1\times {\mathrm{11}}^1\times {\mathrm{359}}^1$

素因数の和:395

約数の個数: 88

約数和(自身を含む): 53058240

約数和(自身を除く): 32839360

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 359, 440, 512, 640, 704, 718, 880, 1024, 1280, 1408, 1436, 1760, 1795, 2560, 2816, 2872, 3520, 3590, 3949, 5120, 5632, 5744, 7040, 7180, 7898, 11264, 11488, 14080, 14360, 15796, 19745, 22976, 28160, 28720, 31592, 39490, 45952, 56320, 57440, 63184, 78980, 91904, 114880, 126368, 157960, 183808, 229760, 252736, 315920, 367616, 459520, 505472, 631840, 919040, 1010944, 1263680, 1838080, 2021888, 2527360, 4043776, 5054720, 10109440, 20218880]

約数ペア:

[(1, 20218880), (2, 10109440), (4, 5054720), (5, 4043776), (8, 2527360), (10, 2021888), (11, 1838080), (16, 1263680), (20, 1010944), (22, 919040), (32, 631840), (40, 505472), (44, 459520), (55, 367616), (64, 315920), (80, 252736), (88, 229760), (110, 183808), (128, 157960), (160, 126368), (176, 114880), (220, 91904), (256, 78980), (320, 63184), (352, 57440), (359, 56320), (440, 45952), (512, 39490), (640, 31592), (704, 28720), (718, 28160), (880, 22976), (1024, 19745), (1280, 15796), (1408, 14360), (1436, 14080), (1760, 11488), (1795, 11264), (2560, 7898), (2816, 7180), (2872, 7040), (3520, 5744), (3590, 5632), (3949, 5120)]