28143580

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{163}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 60752160

約数和(自身を除く): 32608580

約数列:

[1, 2, 4, 5, 10, 20, 89, 97, 163, 178, 194, 326, 356, 388, 445, 485, 652, 815, 890, 970, 1630, 1780, 1940, 3260, 8633, 14507, 15811, 17266, 29014, 31622, 34532, 43165, 58028, 63244, 72535, 79055, 86330, 145070, 158110, 172660, 290140, 316220, 1407179, 2814358, 5628716, 7035895, 14071790, 28143580]

約数ペア:

[(1, 28143580), (2, 14071790), (4, 7035895), (5, 5628716), (10, 2814358), (20, 1407179), (89, 316220), (97, 290140), (163, 172660), (178, 158110), (194, 145070), (326, 86330), (356, 79055), (388, 72535), (445, 63244), (485, 58028), (652, 43165), (815, 34532), (890, 31622), (970, 29014), (1630, 17266), (1780, 15811), (1940, 14507), (3260, 8633)]