21289305

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{439}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 35354880

約数和(自身を除く): 14065575

約数列:

[1, 3, 5, 15, 53, 61, 159, 183, 265, 305, 439, 795, 915, 1317, 2195, 3233, 6585, 9699, 16165, 23267, 26779, 48495, 69801, 80337, 116335, 133895, 349005, 401685, 1419287, 4257861, 7096435, 21289305]

約数ペア:

[(1, 21289305), (3, 7096435), (5, 4257861), (15, 1419287), (53, 401685), (61, 349005), (159, 133895), (183, 116335), (265, 80337), (305, 69801), (439, 48495), (795, 26779), (915, 23267), (1317, 16165), (2195, 9699), (3233, 6585)]