19807520

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2879}}^1$

素因数の和:2937

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 28092640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 2879, 3440, 5758, 6880, 11516, 14395, 23032, 28790, 46064, 57580, 92128, 115160, 123797, 230320, 247594, 460640, 495188, 618985, 990376, 1237970, 1980752, 2475940, 3961504, 4951880, 9903760, 19807520]

約数ペア:

[(1, 19807520), (2, 9903760), (4, 4951880), (5, 3961504), (8, 2475940), (10, 1980752), (16, 1237970), (20, 990376), (32, 618985), (40, 495188), (43, 460640), (80, 247594), (86, 230320), (160, 123797), (172, 115160), (215, 92128), (344, 57580), (430, 46064), (688, 28790), (860, 23032), (1376, 14395), (1720, 11516), (2879, 6880), (3440, 5758)]