20166140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{179}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 43908480

約数和(自身を除く): 23742340

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 131, 172, 179, 215, 262, 358, 430, 524, 655, 716, 860, 895, 1310, 1790, 2620, 3580, 5633, 7697, 11266, 15394, 22532, 23449, 28165, 30788, 38485, 46898, 56330, 76970, 93796, 112660, 117245, 153940, 234490, 468980, 1008307, 2016614, 4033228, 5041535, 10083070, 20166140]

約数ペア:

[(1, 20166140), (2, 10083070), (4, 5041535), (5, 4033228), (10, 2016614), (20, 1008307), (43, 468980), (86, 234490), (131, 153940), (172, 117245), (179, 112660), (215, 93796), (262, 76970), (358, 56330), (430, 46898), (524, 38485), (655, 30788), (716, 28165), (860, 23449), (895, 22532), (1310, 15394), (1790, 11266), (2620, 7697), (3580, 5633)]