20868760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1103}}^1$

素因数の和:1168

約数の個数: 64

約数和(自身を含む): 52462080

約数和(自身を除く): 31593320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1103, 1720, 1892, 2206, 2365, 3784, 4412, 4730, 5515, 8824, 9460, 11030, 12133, 18920, 22060, 24266, 44120, 47429, 48532, 60665, 94858, 97064, 121330, 189716, 237145, 242660, 379432, 474290, 485320, 521719, 948580, 1043438, 1897160, 2086876, 2608595, 4173752, 5217190, 10434380, 20868760]

約数ペア:

[(1, 20868760), (2, 10434380), (4, 5217190), (5, 4173752), (8, 2608595), (10, 2086876), (11, 1897160), (20, 1043438), (22, 948580), (40, 521719), (43, 485320), (44, 474290), (55, 379432), (86, 242660), (88, 237145), (110, 189716), (172, 121330), (215, 97064), (220, 94858), (344, 60665), (430, 48532), (440, 47429), (473, 44120), (860, 24266), (946, 22060), (1103, 18920), (1720, 12133), (1892, 11030), (2206, 9460), (2365, 8824), (3784, 5515), (4412, 4730)]