21579760

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2521}}^1$

素因数の和:2641

約数の個数: 40

約数和(自身を含む): 50661936

約数和(自身を除く): 29082176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2521, 4280, 5042, 8560, 10084, 12605, 20168, 25210, 40336, 50420, 100840, 201680, 269747, 539494, 1078988, 1348735, 2157976, 2697470, 4315952, 5394940, 10789880, 21579760]

約数ペア:

[(1, 21579760), (2, 10789880), (4, 5394940), (5, 4315952), (8, 2697470), (10, 2157976), (16, 1348735), (20, 1078988), (40, 539494), (80, 269747), (107, 201680), (214, 100840), (428, 50420), (535, 40336), (856, 25210), (1070, 20168), (1712, 12605), (2140, 10084), (2521, 8560), (4280, 5042)]