21564560

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2473}}^1$

素因数の和:2595

約数の個数: 40

約数和(自身を含む): 50618040

約数和(自身を除く): 29053480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 2473, 4360, 4946, 8720, 9892, 12365, 19784, 24730, 39568, 49460, 98920, 197840, 269557, 539114, 1078228, 1347785, 2156456, 2695570, 4312912, 5391140, 10782280, 21564560]

約数ペア:

[(1, 21564560), (2, 10782280), (4, 5391140), (5, 4312912), (8, 2695570), (10, 2156456), (16, 1347785), (20, 1078228), (40, 539114), (80, 269557), (109, 197840), (218, 98920), (436, 49460), (545, 39568), (872, 24730), (1090, 19784), (1744, 12365), (2180, 9892), (2473, 8720), (4360, 4946)]