20864135

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{1021}}^1$

素因数の和:1154

約数の個数: 16

約数和(自身を含む): 25852512

約数和(自身を除く): 4988377

約数列:

[1, 5, 61, 67, 305, 335, 1021, 4087, 5105, 20435, 62281, 68407, 311405, 342035, 4172827, 20864135]

約数ペア:

[(1, 20864135), (5, 4172827), (61, 342035), (67, 311405), (305, 68407), (335, 62281), (1021, 20435), (4087, 5105)]