18820670

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:257

約数の個数: 64

約数和(自身を含む): 39688704

約数和(自身を除く): 20868034

約数列:

[1, 2, 5, 10, 11, 22, 23, 43, 46, 55, 86, 110, 115, 173, 215, 230, 253, 346, 430, 473, 506, 865, 946, 989, 1265, 1730, 1903, 1978, 2365, 2530, 3806, 3979, 4730, 4945, 7439, 7958, 9515, 9890, 10879, 14878, 19030, 19895, 21758, 37195, 39790, 43769, 54395, 74390, 81829, 87538, 108790, 163658, 171097, 218845, 342194, 409145, 437690, 818290, 855485, 1710970, 1882067, 3764134, 9410335, 18820670]

約数ペア:

[(1, 18820670), (2, 9410335), (5, 3764134), (10, 1882067), (11, 1710970), (22, 855485), (23, 818290), (43, 437690), (46, 409145), (55, 342194), (86, 218845), (110, 171097), (115, 163658), (173, 108790), (215, 87538), (230, 81829), (253, 74390), (346, 54395), (430, 43769), (473, 39790), (506, 37195), (865, 21758), (946, 19895), (989, 19030), (1265, 14878), (1730, 10879), (1903, 9890), (1978, 9515), (2365, 7958), (2530, 7439), (3806, 4945), (3979, 4730)]