19780816

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{673}}^1$

素因数の和:859

約数の個数: 40

約数和(自身を含む): 42122304

約数和(自身を除く): 22341488

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 167, 176, 334, 668, 673, 1336, 1346, 1837, 2672, 2692, 3674, 5384, 7348, 7403, 10768, 14696, 14806, 29392, 29612, 59224, 112391, 118448, 224782, 449564, 899128, 1236301, 1798256, 2472602, 4945204, 9890408, 19780816]

約数ペア:

[(1, 19780816), (2, 9890408), (4, 4945204), (8, 2472602), (11, 1798256), (16, 1236301), (22, 899128), (44, 449564), (88, 224782), (167, 118448), (176, 112391), (334, 59224), (668, 29612), (673, 29392), (1336, 14806), (1346, 14696), (1837, 10768), (2672, 7403), (2692, 7348), (3674, 5384)]