20408939715

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1375729}}^1$

素因数の和:1375803

約数の個数: 32

約数和(自身を含む): 34866501120

約数和(自身を除く): 14457561405

約数列:

[1, 3, 5, 15, 23, 43, 69, 115, 129, 215, 345, 645, 989, 2967, 4945, 14835, 1375729, 4127187, 6878645, 20635935, 31641767, 59156347, 94925301, 158208835, 177469041, 295781735, 474626505, 887345205, 1360595981, 4081787943, 6802979905, 20408939715]

約数ペア:

[(1, 20408939715), (3, 6802979905), (5, 4081787943), (15, 1360595981), (23, 887345205), (43, 474626505), (69, 295781735), (115, 177469041), (129, 158208835), (215, 94925301), (345, 59156347), (645, 31641767), (989, 20635935), (2967, 6878645), (4945, 4127187), (14835, 1375729)]