21469520

素因数分解:

$2^4\times 5^1\times {\mathrm{167}}^1\times {\mathrm{1607}}^1$

素因数の和:1787

約数の個数: 40

約数和(自身を含む): 50246784

約数和(自身を除く): 28777264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 167, 334, 668, 835, 1336, 1607, 1670, 2672, 3214, 3340, 6428, 6680, 8035, 12856, 13360, 16070, 25712, 32140, 64280, 128560, 268369, 536738, 1073476, 1341845, 2146952, 2683690, 4293904, 5367380, 10734760, 21469520]

約数ペア:

[(1, 21469520), (2, 10734760), (4, 5367380), (5, 4293904), (8, 2683690), (10, 2146952), (16, 1341845), (20, 1073476), (40, 536738), (80, 268369), (167, 128560), (334, 64280), (668, 32140), (835, 25712), (1336, 16070), (1607, 13360), (1670, 12856), (2672, 8035), (3214, 6680), (3340, 6428)]