257381615

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{761}}^1$

素因数の和:979

約数の個数: 32

約数和(自身を含む): 343668096

約数和(自身を除く): 86286481

約数列:

[1, 5, 17, 23, 85, 115, 173, 391, 761, 865, 1955, 2941, 3805, 3979, 12937, 14705, 17503, 19895, 64685, 67643, 87515, 131653, 297551, 338215, 658265, 1487755, 2238101, 3028019, 11190505, 15140095, 51476323, 257381615]

約数ペア:

[(1, 257381615), (5, 51476323), (17, 15140095), (23, 11190505), (85, 3028019), (115, 2238101), (173, 1487755), (391, 658265), (761, 338215), (865, 297551), (1955, 131653), (2941, 87515), (3805, 67643), (3979, 64685), (12937, 19895), (14705, 17503)]