20480404

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{281}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 43585920

約数和(自身を除く): 23105516

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 137, 266, 274, 281, 532, 548, 562, 959, 1124, 1918, 1967, 2603, 3836, 3934, 5206, 5339, 7868, 10412, 10678, 18221, 21356, 36442, 37373, 38497, 72884, 74746, 76994, 149492, 153988, 269479, 538958, 731443, 1077916, 1462886, 2925772, 5120101, 10240202, 20480404]

約数ペア:

[(1, 20480404), (2, 10240202), (4, 5120101), (7, 2925772), (14, 1462886), (19, 1077916), (28, 731443), (38, 538958), (76, 269479), (133, 153988), (137, 149492), (266, 76994), (274, 74746), (281, 72884), (532, 38497), (548, 37373), (562, 36442), (959, 21356), (1124, 18221), (1918, 10678), (1967, 10412), (2603, 7868), (3836, 5339), (3934, 5206)]