21051345

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1277}}^1$

素因数の和:1449

約数の個数: 32

約数和(自身を含む): 38769408

約数和(自身を除く): 17718063

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 157, 471, 785, 1099, 1277, 2355, 3297, 3831, 5495, 6385, 8939, 16485, 19155, 26817, 44695, 134085, 200489, 601467, 1002445, 1403423, 3007335, 4210269, 7017115, 21051345]

約数ペア:

[(1, 21051345), (3, 7017115), (5, 4210269), (7, 3007335), (15, 1403423), (21, 1002445), (35, 601467), (105, 200489), (157, 134085), (471, 44695), (785, 26817), (1099, 19155), (1277, 16485), (2355, 8939), (3297, 6385), (3831, 5495)]