21560840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77003}}^1$

素因数の和:77021

約数の個数: 32

約数和(自身を含む): 55442880

約数和(自身を除く): 33882040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77003, 154006, 308012, 385015, 539021, 616024, 770030, 1078042, 1540060, 2156084, 2695105, 3080120, 4312168, 5390210, 10780420, 21560840]

約数ペア:

[(1, 21560840), (2, 10780420), (4, 5390210), (5, 4312168), (7, 3080120), (8, 2695105), (10, 2156084), (14, 1540060), (20, 1078042), (28, 770030), (35, 616024), (40, 539021), (56, 385015), (70, 308012), (140, 154006), (280, 77003)]