20909084

素因数分解:

$2^2\times 7^2\times {\mathrm{107}}^1\times {\mathrm{997}}^1$

素因数の和:1122

約数の個数: 36

約数和(自身を含む): 43005816

約数和(自身を除く): 22096732

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 107, 196, 214, 428, 749, 997, 1498, 1994, 2996, 3988, 5243, 6979, 10486, 13958, 20972, 27916, 48853, 97706, 106679, 195412, 213358, 426716, 746753, 1493506, 2987012, 5227271, 10454542, 20909084]

約数ペア:

[(1, 20909084), (2, 10454542), (4, 5227271), (7, 2987012), (14, 1493506), (28, 746753), (49, 426716), (98, 213358), (107, 195412), (196, 106679), (214, 97706), (428, 48853), (749, 27916), (997, 20972), (1498, 13958), (1994, 10486), (2996, 6979), (3988, 5243)]