21345280

素因数分解:

$2^{10}\times 5^1\times {\mathrm{11}}^1\times {\mathrm{379}}^1$

素因数の和:415

約数の個数: 88

約数和(自身を含む): 56005920

約数和(自身を除く): 34660640

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, 379, 440, 512, 640, 704, 758, 880, 1024, 1280, 1408, 1516, 1760, 1895, 2560, 2816, 3032, 3520, 3790, 4169, 5120, 5632, 6064, 7040, 7580, 8338, 11264, 12128, 14080, 15160, 16676, 20845, 24256, 28160, 30320, 33352, 41690, 48512, 56320, 60640, 66704, 83380, 97024, 121280, 133408, 166760, 194048, 242560, 266816, 333520, 388096, 485120, 533632, 667040, 970240, 1067264, 1334080, 1940480, 2134528, 2668160, 4269056, 5336320, 10672640, 21345280]

約数ペア:

[(1, 21345280), (2, 10672640), (4, 5336320), (5, 4269056), (8, 2668160), (10, 2134528), (11, 1940480), (16, 1334080), (20, 1067264), (22, 970240), (32, 667040), (40, 533632), (44, 485120), (55, 388096), (64, 333520), (80, 266816), (88, 242560), (110, 194048), (128, 166760), (160, 133408), (176, 121280), (220, 97024), (256, 83380), (320, 66704), (352, 60640), (379, 56320), (440, 48512), (512, 41690), (640, 33352), (704, 30320), (758, 28160), (880, 24256), (1024, 20845), (1280, 16676), (1408, 15160), (1516, 14080), (1760, 12128), (1895, 11264), (2560, 8338), (2816, 7580), (3032, 7040), (3520, 6064), (3790, 5632), (4169, 5120)]