19780216

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{727}}^1$

素因数の和:931

約数の個数: 32

約数和(自身を含む): 39312000

約数和(自身を除く): 19531784

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 179, 358, 716, 727, 1432, 1454, 2908, 3401, 5816, 6802, 13604, 13813, 27208, 27626, 55252, 110504, 130133, 260266, 520532, 1041064, 2472527, 4945054, 9890108, 19780216]

約数ペア:

[(1, 19780216), (2, 9890108), (4, 4945054), (8, 2472527), (19, 1041064), (38, 520532), (76, 260266), (152, 130133), (179, 110504), (358, 55252), (716, 27626), (727, 27208), (1432, 13813), (1454, 13604), (2908, 6802), (3401, 5816)]