20178620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13103}}^1$

素因数の和:13130

約数の個数: 48

約数和(自身を含む): 52835328

約数和(自身を除く): 32656708

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13103, 26206, 52412, 65515, 91721, 131030, 144133, 183442, 262060, 288266, 366884, 458605, 576532, 720665, 917210, 1008931, 1441330, 1834420, 2017862, 2882660, 4035724, 5044655, 10089310, 20178620]

約数ペア:

[(1, 20178620), (2, 10089310), (4, 5044655), (5, 4035724), (7, 2882660), (10, 2017862), (11, 1834420), (14, 1441330), (20, 1008931), (22, 917210), (28, 720665), (35, 576532), (44, 458605), (55, 366884), (70, 288266), (77, 262060), (110, 183442), (140, 144133), (154, 131030), (220, 91721), (308, 65515), (385, 52412), (770, 26206), (1540, 13103)]