20686365

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3863}}^1$

素因数の和:3898

約数の個数: 48

約数和(自身を含む): 43400448

約数和(自身を除く): 22714083

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 3863, 5355, 11589, 19315, 27041, 34767, 57945, 65671, 81123, 135205, 173835, 197013, 243369, 328355, 405615, 459697, 591039, 985065, 1216845, 1379091, 2298485, 2955195, 4137273, 6895455, 20686365]

約数ペア:

[(1, 20686365), (3, 6895455), (5, 4137273), (7, 2955195), (9, 2298485), (15, 1379091), (17, 1216845), (21, 985065), (35, 591039), (45, 459697), (51, 405615), (63, 328355), (85, 243369), (105, 197013), (119, 173835), (153, 135205), (255, 81123), (315, 65671), (357, 57945), (595, 34767), (765, 27041), (1071, 19315), (1785, 11589), (3863, 5355)]