20970285

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{277}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 39551616

約数和(自身を除く): 18581331

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 103, 105, 147, 245, 277, 309, 515, 721, 735, 831, 1385, 1545, 1939, 2163, 3605, 4155, 5047, 5817, 9695, 10815, 13573, 15141, 25235, 28531, 29085, 40719, 67865, 75705, 85593, 142655, 199717, 203595, 427965, 599151, 998585, 1398019, 2995755, 4194057, 6990095, 20970285]

約数ペア:

[(1, 20970285), (3, 6990095), (5, 4194057), (7, 2995755), (15, 1398019), (21, 998585), (35, 599151), (49, 427965), (103, 203595), (105, 199717), (147, 142655), (245, 85593), (277, 75705), (309, 67865), (515, 40719), (721, 29085), (735, 28531), (831, 25235), (1385, 15141), (1545, 13573), (1939, 10815), (2163, 9695), (3605, 5817), (4155, 5047)]