20687715

素因数分解:

$3^2\times 5^1\times {\mathrm{379}}^1\times {\mathrm{1213}}^1$

素因数の和:1603

約数の個数: 24

約数和(自身を含む): 35982960

約数和(自身を除く): 15295245

約数列:

[1, 3, 5, 9, 15, 45, 379, 1137, 1213, 1895, 3411, 3639, 5685, 6065, 10917, 17055, 18195, 54585, 459727, 1379181, 2298635, 4137543, 6895905, 20687715]

約数ペア:

[(1, 20687715), (3, 6895905), (5, 4137543), (9, 2298635), (15, 1379181), (45, 459727), (379, 54585), (1137, 18195), (1213, 17055), (1895, 10917), (3411, 6065), (3639, 5685)]