16781980

素因数分解:

$2^2\times 5^1\times {\mathrm{317}}^1\times {\mathrm{2647}}^1$

素因数の和:2973

約数の個数: 24

約数和(自身を含む): 35366688

約数和(自身を除く): 18584708

約数列:

[1, 2, 4, 5, 10, 20, 317, 634, 1268, 1585, 2647, 3170, 5294, 6340, 10588, 13235, 26470, 52940, 839099, 1678198, 3356396, 4195495, 8390990, 16781980]

約数ペア:

[(1, 16781980), (2, 8390990), (4, 4195495), (5, 3356396), (10, 1678198), (20, 839099), (317, 52940), (634, 26470), (1268, 13235), (1585, 10588), (2647, 6340), (3170, 5294)]