20164640

素因数分解:

$2^5\times 5^1\times {\mathrm{193}}^1\times {\mathrm{653}}^1$

素因数の和:861

約数の個数: 48

約数和(自身を含む): 47959128

約数和(自身を除く): 27794488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 193, 386, 653, 772, 965, 1306, 1544, 1930, 2612, 3088, 3265, 3860, 5224, 6176, 6530, 7720, 10448, 13060, 15440, 20896, 26120, 30880, 52240, 104480, 126029, 252058, 504116, 630145, 1008232, 1260290, 2016464, 2520580, 4032928, 5041160, 10082320, 20164640]

約数ペア:

[(1, 20164640), (2, 10082320), (4, 5041160), (5, 4032928), (8, 2520580), (10, 2016464), (16, 1260290), (20, 1008232), (32, 630145), (40, 504116), (80, 252058), (160, 126029), (193, 104480), (386, 52240), (653, 30880), (772, 26120), (965, 20896), (1306, 15440), (1544, 13060), (1930, 10448), (2612, 7720), (3088, 6530), (3265, 6176), (3860, 5224)]